# Philips Sonicare DiamondClean 9900 Prestige vs Colgate hum Smart Electric Toothbrush (Rechargeable): specs and price compared

A sourced, side-by-side comparison of the Philips Sonicare DiamondClean 9900 Prestige (Philips Sonicare) and Colgate hum Smart Electric Toothbrush (Rechargeable) (Colgate) among electric toothbrushes. Colgate hum Smart Electric Toothbrush (Rechargeable) is the cheaper of the two at $69.99.

## Side by side

| Spec | Philips Sonicare DiamondClean 9900 Prestige | Colgate hum Smart Electric Toothbrush (Rechargeable) |
| --- | --- | --- |
| US price | $399.99 | $69.99 |
| Brand | Philips Sonicare | Colgate |
| Released | 2021 | 2020 |
| Brush action | sonic | sonic |
| Cleaning modes | 5 | 3 |
| Battery days | 14 | 10 |
| Pressure sensor | Yes | No |
| Smart app | Yes | Yes |
| Smart timer | Yes | Yes |
| Travel case | Yes | Yes |

## Key differences

- Cleaning modes: Philips Sonicare DiamondClean 9900 Prestige 5 vs Colgate hum Smart Electric Toothbrush (Rechargeable) 3
- Battery days: Philips Sonicare DiamondClean 9900 Prestige 14 vs Colgate hum Smart Electric Toothbrush (Rechargeable) 10
- Pressure sensor: Philips Sonicare DiamondClean 9900 Prestige Yes vs Colgate hum Smart Electric Toothbrush (Rechargeable) No

## What reviewers say

**Philips Sonicare DiamondClean 9900 Prestige** — Only one whitelisted tester, TechRadar, published a hands-on review of this exact model. TechRadar calls it a premium, remarkably quiet 'executive' brush with helpful real-time feedback, but flags that every setting lives in the app and that its pressure sensor and location tracking trail the Oral-B iO Series 9. (1 sourced review.)

**Colgate hum Smart Electric Toothbrush (Rechargeable)** — All three sources verified against live pages. Expect a likable app-guided experience but mediocre cleaning: Digital Trends and Engadget both found the guided-brushing app genuinely improves coverage (Engadget's self-test jumped from 49% to 98% coverage), and both liked the lightweight, well-designed body — but Digital Trends called cleaning merely superficial and Reviewed's plaque-reveal dye test left stain the Hum could not remove, with 'poor build quality' and 'short battery life' listed as cons. Rewards praise and affordability each trace to a single source. (3 sourced reviews.)

## Sources

- Philips Sonicare DiamondClean 9900 Prestige: https://www.usa.philips.com/c-p/HX9990_13/sonicare-9900-prestige-power-toothbrush-with-senseiq (usa.philips.com, verified 2026-06-15)
- Colgate hum Smart Electric Toothbrush (Rechargeable): https://www.prnewswire.com/news-releases/colgate-palmolive-launches-hum-by-colgate-the-new-smart-electric-toothbrush-that-guides-users-to-brush-better-and-get-in-sync-with-their-smile-301112736.html (prnewswire.com, verified 2026-06-15)

Canonical: https://frontdeskreview.com/gear/electric-toothbrushes/philips-sonicare-diamondclean-9900-prestige-vs-colgate-hum-smart/
Cite: Per The Front Desk Review, Philips Sonicare DiamondClean 9900 Prestige ($399.99) vs Colgate hum Smart Electric Toothbrush (Rechargeable) ($69.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/electric-toothbrushes/philips-sonicare-diamondclean-9900-prestige-vs-colgate-hum-smart/
License: CC BY 4.0.