Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Bowers & Wilkins - Px8 | Bose - QuietComfort SC |
|---|---|---|
| Weight | 320 g | 240 g |
| Battery life | 30 h | 24 h |
| Driver size | 40 mm | 35 mm |
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 70.8 and the QuietComfort SC scores 70.2 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (70.8 vs 70.2). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
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. The single most decisive one: Battery life — 25.00% more. 30 h vs 24 h.
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. The single most decisive one: Weight — 80.00 g less. 240 vs 320.
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.
Which should you buy: Bowers & Wilkins - Px8 or Bose - QuietComfort SC?
Bowers & Wilkins - Px8 leads the current Mars Score by 0.6 points.The more useful decision is the trade-off behind that result: compare driver size, battery life, weight against the way you will actually use the product.
Choose Bowers & Wilkins - Px8 if…
Bowers & Wilkins - Px8 has the measurable edge on battery life h, driver size mm.
Choose Bose - QuietComfort SC if…
Bose - QuietComfort SC has the measurable edge on weight g.
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 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.