Question 1

Which is better, Oral-B iO Series 9 Electric Toothbrush or Waterpik Aquarius Water Flosser?

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 Waterpik Aquarius Water Flosser scored 8.6/10 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 Waterpik Aquarius Water Flosser?

Accepted Answer

The Oral-B iO Series 9 Electric Toothbrush scores 8.9/10 while the Waterpik Aquarius Water Flosser scores 8.6/10. 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 Waterpik Aquarius Water Flosser: Which to Buy?