Question 1

Which is better, Oral-B iO Series 9 Electric Toothbrush or Oral-B iO Series 5 Electric Toothbrush?

Accepted Answer

Based on our testing, the Oral-B iO Series 9 Electric Toothbrush scores higher overall at 9.5/10. The Oral-B iO Series 9 Electric Toothbrush scored 9.5/10 and the Oral-B iO Series 5 Electric Toothbrush scored 9.1/10 in our Best Electric Toothbrushes 2026 evaluation.

Question 2

Is the Oral-B iO Series 9 Electric Toothbrush worth it over the Oral-B iO Series 5 Electric Toothbrush?

Accepted Answer

The Oral-B iO Series 9 Electric Toothbrush scores 9.5/10 while the Oral-B iO Series 5 Electric Toothbrush scores 9.1/10. The Oral-B iO Series 9 Electric Toothbrush is our "Best Overall Electric Toothbrush" pick in the Best Electric Toothbrushes 2026 category.

Oral-B iO Series 9 Electric Toothbrush vs Oral-B iO Series 5 Electric Toothbrush: Which to Buy?