Question 1

Which is better, Oral-B iO Series 9 or Philips Sonicare DiamondClean?

Accepted Answer

Based on our testing, the Oral-B iO Series 9 scores higher overall at 9.1/10. The Oral-B iO Series 9 scored 9.1/10 and the Philips Sonicare DiamondClean scored 8.9/10 in our Best Smart Electric Toothbrushes 2026 evaluation.

Question 2

Is the Oral-B iO Series 9 worth it over the Philips Sonicare DiamondClean?

Accepted Answer

The Oral-B iO Series 9 scores 9.1/10 while the Philips Sonicare DiamondClean scores 8.9/10. The Oral-B iO Series 9 is our "Best Overall" pick in the Best Smart Electric Toothbrushes 2026 category.

Oral-B iO Series 9 vs Philips Sonicare DiamondClean: Which to Buy?