Master & Dynamic - MW09 vs Bose - QuietComfort Ultra Earbuds 2
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Master & Dynamic - MW09 | Bose - QuietComfort Ultra Earbuds 2 |
|---|---|---|
| Battery — buds | 16 h | 6 h |
| Battery — with case | 48 h | 24 h |
| Driver size | 11 mm | 9.3 mm |
| Spatial audio | false | true |
| Water resistance | IP57 | IPX4 |
| Weight per bud | 6 g | 6.2 g |
Between the MW09 and QuietComfort Ultra Earbuds 2, the MW09 comes out ahead in battery — buds / battery — with case, while the QuietComfort Ultra Earbuds 2 wins on spatial audio. Overall, the MW09 scores 86.1 and the QuietComfort Ultra Earbuds 2 scores 70.9 on our Mars Score.
Which should you buy?
The MW09 is the clear pick on raw spec strength, leading by 15.2 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the MW09 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 — buds, battery — with case, driver size, among others. The single most decisive one: Battery — buds — 166.67% more. 16 h vs 6 h.
Pick the QuietComfort Ultra Earbuds 2 if audio quality and feature breadth (ANC, codecs, multipoint) are the lead criteria for your purchase. Its strongest claims are spatial audio. The single most decisive one: Has Spatial audio.
Both ship with comparable active noise cancellation, multipoint, so those specs do not separate the two — focus on the differences below.
Bottom line: the MW09 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Master & Dynamic - MW09 or Bose - QuietComfort Ultra Earbuds 2?
Master & Dynamic - MW09 leads the current Mars Score by 15.2 points.The more useful decision is the trade-off behind that result: compare driver size, battery — buds, weight per bud against the way you will actually use the product.
Choose Master & Dynamic - MW09 if…
Master & Dynamic - MW09 has the measurable edge on battery life buds h, battery life case h, driver size mm.
Choose Bose - QuietComfort Ultra Earbuds 2 if…
Bose - QuietComfort Ultra Earbuds 2 has the measurable edge on 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 Master & Dynamic - MW09 wins
- ▲Battery — buds — 166.67% more. 16 h vs 6 h.
- ▲Battery — with case — 100.00% more. 48 h vs 24 h.
- ▲Driver size — 18.28% more. 11 mm vs 9.3 mm.
- ▲Water resistance: IP57 (vs IPX4).
- ▲Weight per bud — 0.20 g less. 6 vs 6.2.
Why Bose - QuietComfort Ultra Earbuds 2 wins
- ▲Has Spatial audio.
Spec comparison
Design
| Spec | Master & Dynamic - MW09 | Bose - QuietComfort Ultra Earbuds 2 |
|---|---|---|
| Form factor | in-ear | in-ear |
| Weight per bud | 6 glead | 6.2 g |
| Water resistanceⓘ | IP57lead | IPX4 |
Audio
| Spec | Master & Dynamic - MW09 | Bose - QuietComfort Ultra Earbuds 2 |
|---|---|---|
| Driver sizeⓘ | 11 mmlead | 9.3 mm |
| Active noise cancellationⓘ | true | true |
| Transparency mode | true | true |
| Spatial audioⓘ | false | truelead |
Battery
| Spec | Master & Dynamic - MW09 | Bose - QuietComfort Ultra Earbuds 2 |
|---|---|---|
| Battery — buds | 16 hlead | 6 h |
| Battery — with case | 48 hlead | 24 h |
| Wireless case chargingⓘ | true | true |
Connectivity
| Spec | Master & Dynamic - MW09 | Bose - QuietComfort Ultra Earbuds 2 |
|---|---|---|
| Bluetoothⓘ | 5.4 | 5.4 |
| Codecsⓘ | aptX Lossless,aptX Adaptive,AAC,SBC | aptX Adaptive,AAC,SBC |
| Multipointⓘ | true | true |
| In-ear detection | true | true |
Frequently asked
Which has longer battery, MW09 or QuietComfort Ultra Earbuds 2?+
MW09 lasts 16h per charge vs 6h.
Do MW09 or QuietComfort Ultra Earbuds 2 support multipoint?+
Both support multipoint pairing.
Which has ANC, MW09 or QuietComfort Ultra Earbuds 2?+
Both models have active noise cancellation.