Question 1

Which is better, Oral-B iO Series 9 Electric Toothbrush or Philips Sonicare 4100?

Accepted Answer

Based on our testing, the Oral-B iO Series 9 Electric Toothbrush scores higher overall at 8.9/10. The Oral-B iO Series 9 Electric Toothbrush scored 8.9/10 and the Philips Sonicare 4100 scored 8.5/10 in our Best Electric Toothbrushes for Dental Health 2026 evaluation.

Question 2

Is the Oral-B iO Series 9 Electric Toothbrush worth it over the Philips Sonicare 4100?

Accepted Answer

The Oral-B iO Series 9 Electric Toothbrush scores 8.9/10 while the Philips Sonicare 4100 scores 8.5/10. The Oral-B iO Series 9 Electric Toothbrush is our "Best Smart Toothbrush" pick in the Best Electric Toothbrushes for Dental Health 2026 category.

Oral-B iO Series 9 Electric Toothbrush vs Philips Sonicare 4100: Which to Buy?