Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Bose - QuietComfort Headphones | Sony - ULT Wear 2 |
|---|---|---|
| Battery life | 24 h | 50 h |
| Weight | 240 g | 255 g |
| Driver size | 35 mm | 40 mm |
| LDAC | false | true |
Between the QuietComfort Headphones and ULT Wear 2, the QuietComfort Headphones comes out ahead in weight, while the ULT Wear 2 wins on battery life / driver size. Overall, the QuietComfort Headphones scores 70.2 and the ULT Wear 2 scores 75.1 on our Mars Score.
Which should you buy?
The ULT Wear 2 edges ahead on the Mars Score (70.2 vs 75.1), but the 4.9-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the QuietComfort Headphones if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight. The single most decisive one: Weight — 15.00 g less. 240 vs 255.
Pick the ULT Wear 2 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. Its strongest claims are battery life, driver size, ldac. The single most decisive one: Battery life — 108.33% more. 50 h vs 24 h.
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: Bose - QuietComfort Headphones or Sony - ULT Wear 2?
Sony - ULT Wear 2 leads the current Mars Score by 4.9 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 Bose - QuietComfort Headphones if…
Bose - QuietComfort Headphones has the measurable edge on weight g.
Choose Sony - ULT Wear 2 if…
Sony - ULT Wear 2 has the measurable edge on battery life h, driver size mm, supports ldac.
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 Bose - QuietComfort Headphones wins
- ▲Weight — 15.00 g less. 240 vs 255.
Why Sony - ULT Wear 2 wins
- ▲Battery life — 108.33% more. 50 h vs 24 h.
- ▲Driver size — 14.29% more. 40 mm vs 35 mm.
- ▲Has LDAC.
Spec comparison
Design
| Spec | Bose - QuietComfort Headphones | Sony - ULT Wear 2 |
|---|---|---|
| Type | over-ear | over-ear |
| Weight | 240 glead | 255 g |
| Water resistance | none | none |
Audio
| Spec | Bose - QuietComfort Headphones | Sony - ULT Wear 2 |
|---|---|---|
| Driver sizeⓘ | 35 mm | 40 mmlead |
| Impedanceⓘ | 32 Ω | 32 Ω |
| Sensitivityⓘ | 98 dB | 100 dBlead |
| Active noise cancellationⓘ | true | true |
| Transparency mode | true | true |
| Spatial audioⓘ | false | false |
Battery
| Spec | Bose - QuietComfort Headphones | Sony - ULT Wear 2 |
|---|---|---|
| Battery lifeⓘ | 24 h | 50 hlead |
| Fast chargeⓘ | true | true |
Connectivity
| Spec | Bose - QuietComfort Headphones | Sony - ULT Wear 2 |
|---|---|---|
| Bluetoothⓘ | 5.1 | 5.3lead |
| Multipointⓘ | true | true |
| 3.5mm jack | true | true |
| LDACⓘ | false | truelead |
| aptX HDⓘ | false | false |
Frequently asked
Which has better battery life, QuietComfort Headphones or ULT Wear 2?+
ULT Wear 2 lasts 50 hours vs 24 hours.
Do QuietComfort Headphones or ULT Wear 2 have active noise cancellation?+
Both models have active noise cancellation.
Which supports LDAC, QuietComfort Headphones or ULT Wear 2?+
ULT Wear 2 supports LDAC; QuietComfort Headphones does not.