Soft and extra-soft are manufacturer labels, not a shared stiffness scale. Compare the exact product and pack.
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What matters for this question
- Keep each maker’s term in its original wording. This catalog has no common numeric stiffness measurement that would let us rank an Oral-B extra-soft head against a Sonicare extra-soft head.
- Inspect the exact SKU when available: the supplied Philips C3 research records different firmness wording on different packs.
Product records to compare
| Head family | Example fitting handle | Bristle wording | Catalog market |
|---|---|---|---|
| Mijia Smart Multi-oscillation Replacement Heads Soft | Mijia Smart Multi-oscillation Electric Toothbrush Pro | soft | UK, global |
| SOOCAS NEOS II MultiClean Ultra Soft Replacement Head | SOOCAS NEOS II | ultra-soft | US |
| Oral-B iO Gum & Sensitive | Oral-B iO Series 10 | extra-soft | US |
| Philips Sonicare S2 Sensitive | Philips Sonicare 2 Series plaque control (family) | extra-soft | US |
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Explore this feature · Check your exact handle · Care boundaries
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Sources and scope
- ADA toothbrush and replacement guidance · dental professional organization; web full text; retrieved 2026-10-31
- Mijia Multi-oscillation replacement heads FAQ · manufacturer; web full text; retrieved 2026-10-30
- SOOCAS NEOS II ultra-soft replacement · manufacturer; web search excerpt; retrieved 2026-10-30
- Oral-B iO Gum & Sensitive 2-count black · manufacturer; web full text; retrieved 2026-10-30
- Philips US brush-head catalog · manufacturer; web full text; retrieved 2026-10-30
- Philips brush-head system guide · manufacturer; web search excerpt; retrieved 2026-10-30