If you have read or watch any of our other hands-on comparisons, normally we would compare only two electric toothbrushes against one other. However, in this comparison we are looking at four. That said, the primary focus is on the Genius 9000 v the 8000, but as the 8900 and 9900 are such slight variations on the 8000 and 9000 it made sense to include them, as will be explained below.
And if you’re in the process of choosing a new toothbrush, make sure you check out our best electric toothbrush post.
Electric Teeth Verdict
There is little to chose between these two brushes, essentially they are the same, it is really the box contents that for most will be the deciding factor. The Genius 9000 is the better equipped, but commands the higher price tag. Given that you tend to own a toothbrush for a few years the price difference is negligible.
If you travel frequently the 9000 is the answer, but if you travel infrequently and for shorter periods the 8000 will suffice and leave at least £10 (correct at time of writing) in your pocket.
Key Differences Between Models
Below we have listed the key differences between the various Genius models currently available in the UK.
Oral-B Genius 9000 vs 8000: Key Differences
- The Genius 9000 has a tongue cleaning mode that the 8000 does not have
- The Genius 9000 comes with 4 brush heads (CrossAction, 3D White, FlossAction & Sensitive) in the box as opposed to 3 with the 8000 (CrossAction, 3D White, & Sensitive).
- The 8000 comes with a basic plastic travel case but the 9000 offers a premium travel case which allows you to charge your brush and USB powered device such as a smartphone from it too.
- The Genius 8000 is available in white only, whilst the 9000 is available in black, white, silver, orchid purple and rose gold colour options.
Oral-B Genius 9000 vs 8900: Key Differences
- The Genius 8900 has 2 brush handles in the box compared to the one with the Genius 9000.
- The Genius 9000 has a tongue cleaning mode that the 8900 does not have.
- The Genius 9000 comes with 4 brush heads (CrossAction, 3D White, FlossAction & Sensitive) in the box as opposed to 3 with the 8900 (CrossAction, 3D White, & Sensitive).
- The 8900 comes with one basic plastic travel case but the 9000 offers a premium travel case which allows you to charge your brush and USB powered device such as a smartphone from it too.
- The Genius 8900 is available in white only, whilst the 9000 is available in black, white, silver, orchid purple and rose gold colour options.
Oral-B Genius 8000 vs 8900: Key Differences
- The Genius 8900 comes with a 2nd brush handle in the box. This brush handle is the same as the Genius 8000.
Oral-B Genius 9000 vs 9900: Key Differences
- The Genius 9900 comes with a 2nd brush handle in the box. This brush handle is the same as the Genius 9000.
- The Genius 9000 brush can be purchased in white, black, silver, rose gold or orchid purple.
- The 9900 comes with one black and one rose gold handle.
- The Genius 9000 comes with 4 brush heads (CrossAction, 3D White, FlossAction & Sensitive) in the box. The 9900 comes with 4 to (2 x CrossAction, 1 x 3D White & 1 x Sensitive).
Oral-B Genius 8000 vs 9900: Key Differences
- The Genius 9900 comes with 2 brush handles in the box. This brush handle is the same as the Genius 9000
- The Genius 9900 has a tongue cleaning mode that the 8000 does not have
- The Genius 9900 comes with 4 brush heads (2 x CrossAction, 1x 3D White & 1 x Sensitive) in the box as opposed to 3 with the 8000 (CrossAction, 3D White, & Sensitive).
- The 8000 comes with a basic plastic travel case but the 9900 offers a premium travel case which allows you to charge your brush and USB powered device such as a smartphone from it too.
- The Genius 8000 is available in white only, whilst the 9900 comes with a black and rose gold handle.
Oral-B Genius 8900 vs 9900: Key Differences
- The Genius 9900 has a tongue cleaning mode that the 8900 does not have.
- The Genius 9900 comes with 4 brush heads (2 x CrossAction, 1 x 3D White & 1 x Sensitive) in the box as opposed to 3 with the 8900 (CrossAction, 3D White, & Sensitive).
- The 8900 comes with one basic plastic travel case but the 9900 offers a premium travel case which allows you to charge your brush and USB powered device such as a smartphone from it too.
Detailed Genius Comparison
So, what’s the difference between the Oral-B Genius 9000, Genius 8000, 8900 and 9900?
If you have looked over the key differences above, you should have a good idea of what sets each of these brushes apart. Now we can dig a little deeper into each brush and explain what the effects are of these differences.
I feel it is necessary to state that both the Genius 8000 and 9000 benefit from lots of great technology, fitting of a premium toothbrush of today; however neither are ‘perfect’ and if you are unsure as to exactly what you want, have a look around our site and feel free to leave a comment below if you want more assistance.
A premium toothbrush does not mean a better clean, generally more modes or features are suited to some users more than others. There are many advantages to a premium brush but if price is an important factor or you do not have advanced oral healthcare needs there is often no need to go for the likes of a Genius model.
If you would like high end features but paying over £100 is a bit too much, check out the latest recommendations in our best electric toothbrush guide.
Now to dig into the nitty gritty of what sets these models apart.
The Genius range touts some fantastic features and one of the most talked about is the Bluetooth connectivity. Using an Android and iOS app, the brush allows for you to not only personalise and track your brushing but to actually master your technique by using the front facing camera on your smartphone and having this watch as you brush your teeth; providing feedback on what areas of the mouth to clean better or for longer.
It encourages and advises to improve your overall oral health. If you spend a minute on your front teeth, that is a disproportionate amount of time to the rear where germs and bacteria lurks too. The app gives you the on screen encouragement to spend time reaching all parts of the mouth.
Here at Electric Teeth we like for users to get the best value you can from an electric toothbrush and the interchangeable heads means that you can share a brush handle with other family members rather than all having their own brushes that needs charging etc.
Not only does sharing the brush handle reduce the amount in your bathroom it can reduce the overall cost as this is shared over more users. However do be aware heavy use will likely mean the brush will wear out sooner, but you have the option of a 3 year warranty with any of the Oral-B brushes discussed in this post.
However this desire to share becomes slightly more complicated lost if you want to take advantage of the Bluetooth tracking and logging your cleans.
Essentially the brush is configured to work best for one user.
It is possible to configure it for two or more users, as I explain in the sharing an electric toothbrush article, but I don’t think it is ideal.
The Oral-B app is setup so you have only one user profile.
Two users would need to have the app setup on their individual phones.
Whilst the brush will pair with multiple phones, by default, the brush will retain the data from the last 20 cleaning sessions on the brush. As the brush and phone sync via Bluetooth, this data is saved in the app and presented back to you.
The problem is that if you share a brush handle not all the data on the brush will be yours and it is easy for the data to get mixed up with that of the other user.
The workaround is to turn off automatic session syncing in the settings of the app. But, this means, every time you brush your teeth, if you want to log the data you must have the smartphone with the app on, in range so the data can sync, otherwise it will not retain it.
Now, if you are using the app only for the motion tracking as you brush and are not too worried about the logging of all the data, then well maybe you can get by with the default setup.
In a typical family environment, you don’t need more than one charging station or smartphone holder but the two brush handles might be an advantage and you gain better value from buying the 8900 over the 8000 in this particular circumstance.
If all 5 members of your family want an advanced brush like this and to track their cleans, then I am afraid to report you will have to purchase multiples, the solutions are not that perfect!
Whilst, in my opinion, the app tracking for more than one person are the real benefits of the dual-handled 8900 and 9900, for you there may be other reasons as to opt for this.
So, hopefully, this clarifies and explains where the Genius 8900 and 9900 really come into their own and I shall now focus on comparing the 8000 with the 9000.
Starting with the cleaning modes, the 9000 benefits from one extra cleaning mode, a tongue cleaner. This is not available on the Genius 8000.
The tongue cleaning mode works best with the sensitive brush head, which is included with both models. The mode has a reduced run time and lower oscillation and pulsation count, which can be advantageous because the tongue can be sensitive and the higher power modes will likely make it difficult to do a proper job of cleaning the tongue.
You do not ‘need’ to have this mode to clean your tongue but you may see the advantages.
For further reading see our post on different cleaning modes and how they compare.
It is worth noting that the lack of this cleaning mode does mean that the front panel on the 9000 does show an extra cleaning mode icon.
The aforementioned cleaning modes work best with different brush heads, although there is nothing technically stopping you using any brush head with any cleaning mode.
In the box with both the 8000 and 9000 you receive 1 x CrossAction, 1 x 3D White and 1 x Sensitive brush head, but the 9000 comes with 1 x FlossAction head also.
There is a small benefit here and it allows you to try out the different heads and help you decide which you may choose to use. You can always purchase spares or change the brush head based on your preference or cleaning mode.
The different heads do look to achieve different things and are not supplied just for effect. Click here to read about how the brush heads compare and what they do differently.
Both the 8000 and 9000 come with a travel case, but this is another of the big differentiators between the two. The 8000 is said to come with a ‘premium’ travel case and the 9000 a premium case that also charges the brush and your phone.
The use of the word premium is a bit of a stretch for the 8000 case. Yes it is a nice inclusion that does not come with many of the cheaper brushes and it is a bit better quality, but in my opinion, the smart travel case that comes with the 9000 is in a league of its own in comparison to the 8000’s.
Instead of a thin, blown plastic shell, the 9000’s case is a solid, soft touch, smart, weighty and premium feeling option.
Some of the weight comes from the electronics inside but just the look and feel is so much better.
Sadly not even the 8000 case comes with a smartphone holder like the 9000 does, but the 8000 boasts the same smartphone pairing technology.
The 9000’s case does have a USB port into which you can connect the USB cable for your smartphone or other gadgets to charge them via the case. The smart travel case does not have a battery built in and will only charge them when you connect the proprietary mains adapter to it.
When connected, the brush in the case gets charged too.
Both cases house the one brush handle and up to 2 brush heads.
The Genius 8000 is available in white only, whilst the 9000 is available in black, white and rose gold colour options.
The black brush handle looks smart, but the brush heads are white, which whilst a classic colour combination it would be nice if they matched. There is also a rose gold colour option. This looks very similar to the white brush, but the difference is that the inset on the front of the handle is the rose gold rather than a transparent/silver colour on the white model. Be it black or white the large rubber grip on the back of the handle is colour matched.
That is it. The key differences explained.
Just in case you have yet to do a lot of research or would like to know more, let me give a quick summary of where the brushes are identical.
Both measure 24cm tall (with a brush head attached), 2.7cm wide and 3.2cm thick and weigh 140g.
To the front, the lower third of the brush handle is where you will find the battery status. The battery icon is illuminated with a white light and the 3 bars deplete as the power reduces. When really low the icon will flash red.
The battery built into these brushes is not all that big and lasts approximately 48 minutes or 12 days, based on one user.
The charging stand that supplied has a 2 pin connector that attaches to a shaver socket in a bathroom (220-240v). If you do not have one, you can purchase an adapter to allow you to connect it to a conventional 3 pin UK mains socket.
Above the battery icon are the icons for the cleaning modes, each one will illuminate as it is selected. To select the mode, use the down arrow selector key beneath the power button; both of which are firm to the touch and backlit.
On the neck of the brush is a LED SmartRing that can be customised one of 12 colours, flashes at 30 second intervals when it is time to change quadrant and goes red when applying too much pressure during brushing. When the pressure is relieved, the light will go out.
A 2 minute timer for the standard daily clean is built in and the audible and LED notifications to assist with achieving this (some modes last for more or less time).
Any Genius model comes with a moulded plastic brush head storage compartment, complete with lid. Housing up to 4 brush heads, this housing snaps to the charging dock to provide a neat charging and brush head storage solution.
A smartphone holder is provided too as a way to hold your smartphone and run the Oral-B app.
Aside from the tongue cleaning mode, all Genius brushes have the Daily Clean, Gum Care, Sensitive, Whitening and Pro-Clean modes.
Another noteworthy point that applies to both brushes is that Oral-B do supply each brush with a 2 year warranty, which can be extended to 3 years, if you register the brush online. This covers part failure and not things like user damage.
An electric toothbrush will ensure a more regular and balanced clean across the teeth and mouth than manual brushing might hence you will often see claims of 100% more plaque removal.
Where you may see some benefit is with the tongue cleaning mode on the Genius 9000.
Many forget to clean their tongues, and whilst naturally cleaned by saliva, a quick clean with a brush can really help remove any lingering bacteria and freshen the breath.
You could use any cleaning mode, such as daily clean to run the brush head across the tongue. However, the 9000 does have a special mode that lasts for 20 seconds and reduces the oscillations and pulsations to a lesser frequency, which is preferred when cleaning the more sensitive surface of the tongue. How desirable and beneficial this is for you will be a personal preference, but is arguably valuable long term to assist with optimum oral health.
Is one better priced than the other?
Yes, the Genius 8000 is the cheaper of the four brushes.
Based on their recommended retail price (RRP) there is a £20 difference, £259.99* for the 8000 and £279.99* for the 9000; but the reality is there is just a £10 difference in the cost when actually buying the brush. This comes about because the brushes are so infrequently sold at their RRP due to the competitive sales nature of retailers.
We have reviewed both the 8000 and 9000 in depth and at the time of writing they worked out at 15p and 16p per day to own, respectively, over the course of 3 years based on one user.
Prices are always changing so if this is a big deciding factor, we advise calculating this at the time of purchase yourself.
Conclusion & which one should I buy?
When there are so few differences between the brushes, deciding which one to go for or which to recommend becomes really difficult, but thankfully there are enough differences and personal circumstances that should help you decide.
Do you want a dedicated tongue cleaning mode? If the answer is yes, go for the Genius 9000.
Do you particularly want a black coloured toothbrush? If the answer is yes, go for the Genius 9000.
Do you travel frequently and are often away for more than a ‘few’ days? If the answer is yes, go for the Genius 9000.
Are you on a budget or particularly price sensitive? If the answer is yes, go for the Genius 8000.
Are you keen to take advantage of the Oral-B position tracking technology, but share the brush with a partner or other family member who has the same desire? If the answer is yes, go for the Genius 8900 or 9900.
The additional brush head with the Genius 9000 is neither here nor there in the decision making process. The biggest differentiator is the smart travel case and just how much you want to track your teeth cleaning.
Whatever you choose, I am confident you will be impressed providing you make the most informed decision using the information provided.
On reading this you may have found neither is right and there are many brushes from Oral-B you could consider. If so, we recommend checking out our best electric toothbrush comparison.
Ultimately, whatever brush you decide upon, it is you who needs to make the decision; but do so based on which is best for your needs or the end user, if you are purchasing on behalf of somebody else.
Only pay the price you are happy with and do not be led into buying something if it is not right.
Hopefully, we have presented the facts and made the whole decision process that little bit easier.
If you found this useful, have any thoughts and opinions from going through this choice process yourself or have used either brush and want to comment, please do use the comments section below; what you have to say could be of real benefit to somebody else.
*Please note any prices stated below were correct at the time of writing and may have changed by the time you come to buy. We always recommend checking the prices of several retailers before you make a purchase.