Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Google - Pixel Buds Pro 2 | Anker - Liberty 4 Pro |
|---|---|---|
| Battery — with case | 30 h | 40 h |
| Battery — buds | 8 h | 10 h |
| Driver size | 11 mm | 10.5 mm |
| Spatial audio | true | false |
| Weight per bud | 4.7 g | 5.6 g |
| Water resistance | IP54 | IPX4 |
Between the Pixel Buds Pro 2 and Liberty 4 Pro, the Pixel Buds Pro 2 comes out ahead in driver size / spatial audio, while the Liberty 4 Pro wins on battery — with case / battery — buds. Overall, the Pixel Buds Pro 2 scores 78.7 and the Liberty 4 Pro scores 81.6 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (78.7 vs 81.6). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the Pixel Buds Pro 2 if audio quality and feature breadth (ANC, codecs, multipoint) are the lead criteria for your purchase. The biggest gaps in its favor are driver size, spatial audio, weight per bud, among others. The single most decisive one: Driver size — 4.76% more. 11 mm vs 10.5 mm.
Pick the Liberty 4 Pro 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 — with case, battery — buds. The single most decisive one: Battery — with case — 33.33% more. 40 h vs 30 h.
Both ship with comparable 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: Google - Pixel Buds Pro 2 or Anker - Liberty 4 Pro?
Anker - Liberty 4 Pro leads the current Mars Score by 2.9 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 Google - Pixel Buds Pro 2 if…
Google - Pixel Buds Pro 2 has the measurable edge on driver size mm, has spatial audio, weight per bud g.
Choose Anker - Liberty 4 Pro if…
Anker - Liberty 4 Pro has the measurable edge on battery life case h, battery life buds h.
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 Google - Pixel Buds Pro 2 wins
- ▲Driver size — 4.76% more. 11 mm vs 10.5 mm.
- ▲Has Spatial audio.
- ▲Weight per bud — 0.90 g less. 4.7 vs 5.6.
- ▲Water resistance: IP54 (vs IPX4).
Why Anker - Liberty 4 Pro wins
- ▲Battery — with case — 33.33% more. 40 h vs 30 h.
- ▲Battery — buds — 25.00% more. 10 h vs 8 h.
Spec comparison
Design
| Spec | Google - Pixel Buds Pro 2 | Anker - Liberty 4 Pro |
|---|---|---|
| Form factor | in-ear | in-ear |
| Weight per bud | 4.7 glead | 5.6 g |
| Water resistanceⓘ | IP54lead | IPX4 |
Audio
| Spec | Google - Pixel Buds Pro 2 | Anker - Liberty 4 Pro |
|---|---|---|
| Driver sizeⓘ | 11 mmlead | 10.5 mm |
| Active noise cancellationⓘ | true | true |
| Transparency mode | true | true |
| Spatial audioⓘ | truelead | false |
Battery
| Spec | Google - Pixel Buds Pro 2 | Anker - Liberty 4 Pro |
|---|---|---|
| Battery — buds | 8 h | 10 hlead |
| Battery — with case | 30 h | 40 hlead |
| Wireless case chargingⓘ | true | true |
Connectivity
| Spec | Google - Pixel Buds Pro 2 | Anker - Liberty 4 Pro |
|---|---|---|
| Bluetoothⓘ | 5.3 | 5.4lead |
| Codecsⓘ | AAC,SBC | LDAC,AAC,SBC |
| Multipointⓘ | true | true |
| In-ear detection | true | true |
Frequently asked
Which has longer battery, Pixel Buds Pro 2 or Liberty 4 Pro?+
Liberty 4 Pro lasts 10h per charge vs 8h.
Do Pixel Buds Pro 2 or Liberty 4 Pro support multipoint?+
Both support multipoint pairing.
Which has ANC, Pixel Buds Pro 2 or Liberty 4 Pro?+
Both models have active noise cancellation.