Between the Px8 and QuietComfort SC, the Px8 comes out ahead in battery life / driver size, while the QuietComfort SC wins on weight. Overall, the Px8 scores 67.4 and the QuietComfort SC scores 62.9 on our Mars Score.
Which should you buy?
The Px8 edges ahead on the Mars Score (67.4 vs 62.9), but the 4.5-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Px8 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. The biggest gaps in its favor are battery life, driver size.
Pick the QuietComfort SC if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight.
Both ship with comparable active noise cancellation, spatial audio, multipoint, 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.
Why Bowers & Wilkins - Px8 wins
- ▲Battery life — 25.00% more. 30 h vs 24 h.
- ▲Driver size — 14.29% more. 40 mm vs 35 mm.
Why Bose - QuietComfort SC wins
- ▲Weight — 80.00 g less. 240 vs 320.
Spec comparison
Design
| Spec | Bowers & Wilkins - Px8 | Bose - QuietComfort SC |
|---|---|---|
| Type | over-ear | over-ear |
| Weight | 320 g | 240 glead |
| Water resistance | none | none |
Audio
| Spec | Bowers & Wilkins - Px8 | Bose - QuietComfort SC |
|---|---|---|
| Driver sizeⓘ | 40 mmlead | 35 mm |
| Impedanceⓘ | 32 Ω | 32 Ω |
| Sensitivityⓘ | 111 dBlead | 98 dB |
| Active noise cancellationⓘ | true | true |
| Transparency mode | true | true |
| Spatial audioⓘ | false | false |
Battery
| Spec | Bowers & Wilkins - Px8 | Bose - QuietComfort SC |
|---|---|---|
| Battery life | 30 hlead | 24 h |
| Fast chargeⓘ | true | true |
Connectivity
| Spec | Bowers & Wilkins - Px8 | Bose - QuietComfort SC |
|---|---|---|
| Bluetoothⓘ | 5.2lead | 5.1 |
| Multipointⓘ | true | true |
| 3.5mm jack | true | true |
| LDACⓘ | false | false |
| aptX HDⓘ | truelead | false |
Frequently asked
Which has better battery life, Px8 or QuietComfort SC?+
Px8 lasts 30 hours vs 24 hours.
Do Px8 or QuietComfort SC have active noise cancellation?+
Both models have active noise cancellation.
Which supports LDAC, Px8 or QuietComfort SC?+
Neither supports LDAC.
Spec-level deep dives
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