Electric toothbrushes · owner-verdict comparison

Oral-B iO Series 9 vs Philips Sonicare ProtectiveClean 4100: what real owners say

Real owners lean toward the Philips Sonicare ProtectiveClean 4100: 64% of 22 owners recommend it, vs 42% of 26 for the Oral-B iO Series 9.

Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score

Oral-B iO Series 9

42%of 26 owners recommend
42% recommend · 12% neutral · 46% don't
Owners praise
  • Powerful, thorough cleaning
  • Premium, solid-feeling brush
  • Gentle on sensitive teeth
Owners complain about
  • Battery life short or degrades
  • Build-quality failures within a few years
  • Mold builds up in brush head
Full owner report →

Philips Sonicare ProtectiveClean 4100

64%of 22 owners recommend
64% recommend · 9% neutral · 27% don't
Full owner report →

What Oral-B iO Series 9 owners say

“but it's value to my oral health has been inexpressible and absolutely worth every penny that was spent.”
— niftyynifflerr on Reddit
“The oral b series 9 spins so much faster than my cheap Amazon electric toothbrush.”
— @andrewvillanueva3722 on YouTube
“I find it crazy that the charging case isn’t USB-C”
— @omgisthatvik on YouTube

What Philips Sonicare ProtectiveClean 4100 owners say

“feel so amazed by how smooth they are!”
— @505lori on YouTube
“I just got one and throwing my old brush away! Awesome”
— @RedKrawler on YouTube
“it is a) super loud, and b) feels like it's stinging my gums”
— @SrslySylli on YouTube