Bowers & Wilkins - Px8 vs Bose - QuietComfort Ultra 2
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 Ultra 2 |
|---|---|---|
| Weight | 320 g | 253 g |
| Driver size | 40 mm | 35 mm |
| Spatial audio | false | true |
Between the Px8 and QuietComfort Ultra 2, the Px8 comes out ahead in driver size, while the QuietComfort Ultra 2 wins on weight / spatial audio. Overall, the Px8 scores 70.8 and the QuietComfort Ultra 2 scores 70.8 on our Mars Score.
Which should you buy?
These two are evenly matched on the broad strokes; the decision sits on which individual spec advantages weigh more for your use.
Pick the Px8 if you care most about driver size. The biggest gaps in its favor are driver size. The single most decisive one: Driver size — 14.29% more. 40 mm vs 35 mm.
Pick the QuietComfort Ultra 2 if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight, spatial audio. The single most decisive one: Weight — 67.00 g less. 253 vs 320.
Both ship with comparable battery life, active noise cancellation, 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 Ultra 2?
The two products are effectively tied on the current Mars Score.The more useful decision is the trade-off behind that result: compare driver size, weight against the way you will actually use the product.
Choose Bowers & Wilkins - Px8 if…
Bowers & Wilkins - Px8 has the measurable edge on driver size mm.
Choose Bose - QuietComfort Ultra 2 if…
Bose - QuietComfort Ultra 2 has the measurable edge on weight g, has spatial audio.
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
- ▲Driver size — 14.29% more. 40 mm vs 35 mm.
Why Bose - QuietComfort Ultra 2 wins
- ▲Weight — 67.00 g less. 253 vs 320.
- ▲Has Spatial audio.
Spec comparison
Design
| Spec | Bowers & Wilkins - Px8 | Bose - QuietComfort Ultra 2 |
|---|---|---|
| Type | over-ear | over-ear |
| Weight | 320 g | 253 glead |
| Water resistance | none | none |
Audio
| Spec | Bowers & Wilkins - Px8 | Bose - QuietComfort Ultra 2 |
|---|---|---|
| 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 | truelead |
Battery
| Spec | Bowers & Wilkins - Px8 | Bose - QuietComfort Ultra 2 |
|---|---|---|
| Battery lifeⓘ | 30 h | 30 h |
| Fast chargeⓘ | true | true |
Connectivity
| Spec | Bowers & Wilkins - Px8 | Bose - QuietComfort Ultra 2 |
|---|---|---|
| Bluetoothⓘ | 5.2 | 5.4lead |
| Multipointⓘ | true | true |
| 3.5mm jack | true | true |
| LDACⓘ | false | false |
| aptX HDⓘ | true | true |
Frequently asked
Which has better battery life, Px8 or QuietComfort Ultra 2?+
QuietComfort Ultra 2 lasts 30 hours vs 30 hours.
Do Px8 or QuietComfort Ultra 2 have active noise cancellation?+
Both models have active noise cancellation.
Which supports LDAC, Px8 or QuietComfort Ultra 2?+
Neither supports LDAC.