Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Dyson - Purifier Cool TP10 | Winix - C909 |
|---|---|---|
| CADR | 350 m³/h | 500 m³/h |
| Coverage | 60 m² | 50 m² |
| Min noise | 32 dB | 27 dB |
Between the Purifier Cool TP10 and C909, the Purifier Cool TP10 comes out ahead in coverage, while the C909 wins on cadr / min noise. Overall, the Purifier Cool TP10 scores 74 and the C909 scores 77.7 on our Mars Score.
Which should you buy?
The C909 edges ahead on the Mars Score (74 vs 77.7), but the 3.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Purifier Cool TP10 if you care most about coverage. The biggest gaps in its favor are coverage. The single most decisive one: Coverage — 20.00% more. 60 m² vs 50 m².
Pick the C909 if you care most about cadr / min noise. Its strongest claims are cadr, min noise. The single most decisive one: CADR — 42.86% more. 500 m³/h vs 350 m³/h.
Both ship with comparable true hepa h13+, activated carbon, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Dyson - Purifier Cool TP10 or Winix - C909?
Winix - C909 leads the current Mars Score by 3.7 points.The more useful decision is the trade-off behind that result: compare cadr, coverage, min noise against the way you will actually use the product.
Choose Dyson - Purifier Cool TP10 if…
Dyson - Purifier Cool TP10 has the measurable edge on coverage m2.
Choose Winix - C909 if…
Winix - C909 has the measurable edge on cadr m3h, noise db min.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Dyson - Purifier Cool TP10 wins
- ▲Coverage — 20.00% more. 60 m² vs 50 m².
Why Winix - C909 wins
- ▲CADR — 42.86% more. 500 m³/h vs 350 m³/h.
- ▲Min noise — 5.00 dB less. 27 vs 32.
Spec comparison
Performance
| Spec | Dyson - Purifier Cool TP10 | Winix - C909 |
|---|---|---|
| CADR | 350 m³/h | 500 m³/hlead |
| Coverage | 60 m²lead | 50 m² |
| True HEPA H13+ | true | true |
| Activated carbon | true | true |
Smart & Noise
| Spec | Dyson - Purifier Cool TP10 | Winix - C909 |
|---|---|---|
| Min noise | 32 dB | 27 dBlead |
| Air quality sensor | true | true |
| Smart app | true | true |