Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Bose - QuietComfort Ultra 2 | Sony - ULT Wear 2 |
|---|---|---|
| Battery life | 30 h | 50 h |
| Driver size | 35 mm | 40 mm |
| Weight | 253 g | 255 g |
| Spatial audio | true | false |
| LDAC | false | true |
Between the QuietComfort Ultra 2 and ULT Wear 2, the QuietComfort Ultra 2 comes out ahead in weight / spatial audio, while the ULT Wear 2 wins on battery life / driver size. Overall, the QuietComfort Ultra 2 scores 70.8 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 (70.8 vs 75.1), but the 4.3-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the QuietComfort Ultra 2 if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight, spatial audio. The single most decisive one: Weight — 2.00 g less. 253 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 — 66.67% more. 50 h vs 30 h.
Both ship with comparable active noise cancellation, multipoint, water resistance, 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 Ultra 2 or Sony - ULT Wear 2?
Sony - ULT Wear 2 leads the current Mars Score by 4.3 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 Ultra 2 if…
Bose - QuietComfort Ultra 2 has the measurable edge on weight g, has spatial audio.
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 Ultra 2 wins
- ▲Weight — 2.00 g less. 253 vs 255.
- ▲Has Spatial audio.
Why Sony - ULT Wear 2 wins
- ▲Battery life — 66.67% more. 50 h vs 30 h.
- ▲Driver size — 14.29% more. 40 mm vs 35 mm.
- ▲Has LDAC.
Spec comparison
Design
| Spec | Bose - QuietComfort Ultra 2 | Sony - ULT Wear 2 |
|---|---|---|
| Type | over-ear | over-ear |
| Weight | 253 glead | 255 g |
| Water resistance | none | none |
Audio
| Spec | Bose - QuietComfort Ultra 2 | 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ⓘ | truelead | false |
Battery
| Spec | Bose - QuietComfort Ultra 2 | Sony - ULT Wear 2 |
|---|---|---|
| Battery lifeⓘ | 30 h | 50 hlead |
| Fast chargeⓘ | true | true |
Connectivity
| Spec | Bose - QuietComfort Ultra 2 | Sony - ULT Wear 2 |
|---|---|---|
| Bluetoothⓘ | 5.4lead | 5.3 |
| Multipointⓘ | true | true |
| 3.5mm jack | true | true |
| LDACⓘ | false | truelead |
| aptX HDⓘ | truelead | false |
Frequently asked
Which has better battery life, QuietComfort Ultra 2 or ULT Wear 2?+
ULT Wear 2 lasts 50 hours vs 30 hours.
Do QuietComfort Ultra 2 or ULT Wear 2 have active noise cancellation?+
Both models have active noise cancellation.
Which supports LDAC, QuietComfort Ultra 2 or ULT Wear 2?+
ULT Wear 2 supports LDAC; QuietComfort Ultra 2 does not.