The Series 9 comes with a power2go charging case that allows the iO to be charged inside whereas the Series 8 comes with a standard travel case. I’ve yet to find anyone who uses them all or any real justification for having so many. The reality is the cleaning results between each are very similar. Oral-B ROUND brush heads REACH WHERE RECTANGULAR manual brushes DON'T. Experience our BEST CLEAN from Oral-B, #1 brand most used by dentists worldwide

To my knowledge, all brushes have the same battery. All are claimed to last 2 weeks on a single charge.

A more budget-friendly version of the iO Series 9 that cuts no important corners

Aside from this the two brushes feel the same in hand, weigh the same and have the same warranty, they both come with a charging stand and 1 brush head in the box. Pro 2 2000 vs Pro 3 3000 Both do a job and give a home to brush heads, but the 9000 is a neater and more desirable solution. The Series 8 has 6 cleaning modes (daily clean, sensitive, super sensitive, intense, whitening & gum care) compared to the 7 of the Series 9 (daily clean, sensitive, intense, whitening, gum care & tongue clean). The extra mode the iO9 has is tongue clean. For the majority of people, myself included the Oral-B Pro 3 3500 is the toothbrush to go for. It offers a balance of cleaning performance and features at a price most will find affordable. Together these alert you to relieve the pressure when brushing. Once relieved the light will go out, the brush motor speed up and the sound change again.

The iO6-10 does allow the color to be changed via the in-handle display. But, you have fewer color choices than if you navigate to the app. There is some variance in the colors availableI don’t have the figures of the number of oscillations and pulsations on the older Pro 5000 available to give confirmation of the power difference. And add to this, there have been various iterations of the 5000 over the years, so it would be important to find out the exact one to say 100%. KEEP YOUR MOUTH HEALTHIER FOR LONGER! Join 8 out of 10 people that became better brushers thanks to iO PERSONALIZED GUIDANCE in just 1 week. The reality is, you could use any mode on the brush to clean your tongue just ending the clean sooner. Although the speed and number of oscillations will be different. With either you have to power the brush on to change mode, but the Genius will remember the cleaning mode and start on this next time it is powered on, the 5000 does not. Depending on the model you go for, you have the choice between 3, 4, 5, 6, or 7 brushing modes. 7 is the maximum number of cleaning modes available on any Oral-B brush.