Looking for an honest Oral-B iO Series 7 Rechargeable Connected Electric Toothbrush vs Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx comparison in 2026? We scored both electric toothbrushes on the same six-dimension framework — performance, battery, display, camera, design and value — using identical methodology, so the numbers below are directly comparable. In our overall scoring the Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx comes out ahead 61/100 to 68/100 — a 7-point gap. The widest gap is in performance, where the Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx pulls noticeably ahead. On price the Oral-B iO Series 7 Rechargeable Connected Electric Toothbrush undercuts the Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx by 86% ($109.95 vs $205), which materially changes the value calculus for budget-conscious buyers.
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Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx narrowly beats the Oral-B iO Series 7 Rechargeable Connected Electric Toothbrush in the electric toothbrushes category, especially in performance, scoring 68 vs 61. If you want the better overall electric toothbrushes, Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx is the recommended choice.
Picking Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx over Oral-B iO Series 7 Rechargeable Connected Electric Toothbrush means trading these off.
Specs are roughly matched — winner decided on overall scoring, not a specific spec advantage.
Oral-B
$110
Oral-B
$205
Scores are relative within the electric toothbrushescategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
✓ Pros
✗ Cons
✓ Pros
✗ Cons
| Spec | Oral-B iO Series 7 Rechargeable Connected Electric Toothbrush | Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black OnyxW |
|---|---|---|
| Price | 109.95$✓ | 205$ |
| Battery Life | 14hrs | 14hrs |
Buy Oral-B iO Series 7 Rechargeable Connected Electric Toothbrush if…
The Oral-B iO Series 7 Rechargeable Connected Electric Toothbrush is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Buy Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx if…
Buy the Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.
Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx narrowly beats the Oral-B iO Series 7 Rechargeable Connected Electric Toothbrush in the electric toothbrushes category, especially in performance, scoring 68 vs 61. If you want the better overall electric toothbrushes, Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx is the recommended choice.
No, Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx scores higher (68 vs 61).
Oral-B iO Series 7 Rechargeable Connected Electric Toothbrush is cheaper at $109.95 vs $205 for the Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx.
The Oral-B iO Series 7 Rechargeable Connected Electric Toothbrush is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Buy the Oral-B iO Series 9 Rechargeable Electric Toothbrush - Black Onyx if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.
Both offer 14 hours of battery life.
Reviewed by VersusMatrix Editorial Team
Last updated: May 21, 2026
Methodology: AI-powered analysis of technical specifications from manufacturer data. Scores are calculated by comparing products across multiple dimensions and normalized relative to the full category database. Our editorial process is independent and not influenced by affiliate partnerships.