Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Anker - Liberty 4 Pro | Sony - WF-1000XM6 |
|---|---|---|
| Battery — buds | 10 h | 8 h |
| Battery — with case | 40 h | 32 h |
| Driver size | 10.5 mm | 8.4 mm |
| Spatial audio | false | true |
| Weight per bud | 5.6 g | 5.4 g |
Between the Liberty 4 Pro and WF-1000XM6, the Liberty 4 Pro comes out ahead in battery — buds / battery — with case, while the WF-1000XM6 wins on spatial audio / weight per bud. Overall, the Liberty 4 Pro scores 81.6 and the WF-1000XM6 scores 74.5 on our Mars Score.
Which should you buy?
The Liberty 4 Pro edges ahead on the Mars Score (81.6 vs 74.5), but the 7.1-point gap is small enough that the right pick comes down to which spec advantages matter to you.
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. The biggest gaps in its favor are battery — buds, battery — with case, driver size. The single most decisive one: Battery — buds — 25.00% more. 10 h vs 8 h.
Pick the WF-1000XM6 if audio quality and feature breadth (ANC, codecs, multipoint) are the lead criteria for your purchase. Its strongest claims are spatial audio, weight per bud. The single most decisive one: Has Spatial audio.
Both ship with comparable active noise cancellation, water resistance, multipoint, so those specs do not separate the two — focus on the differences below.
Bottom line: the Liberty 4 Pro 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: Anker - Liberty 4 Pro or Sony - WF-1000XM6?
Anker - Liberty 4 Pro leads the current Mars Score by 7.1 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 Anker - Liberty 4 Pro if…
Anker - Liberty 4 Pro has the measurable edge on battery life buds h, battery life case h, driver size mm.
Choose Sony - WF-1000XM6 if…
Sony - WF-1000XM6 has the measurable edge on has spatial audio, weight per bud g.
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 Anker - Liberty 4 Pro wins
- ▲Battery — buds — 25.00% more. 10 h vs 8 h.
- ▲Battery — with case — 25.00% more. 40 h vs 32 h.
- ▲Driver size — 25.00% more. 10.5 mm vs 8.4 mm.
Why Sony - WF-1000XM6 wins
- ▲Has Spatial audio.
- ▲Weight per bud — 0.20 g less. 5.4 vs 5.6.
Spec comparison
Design
| Spec | Anker - Liberty 4 Pro | Sony - WF-1000XM6 |
|---|---|---|
| Form factor | in-ear | in-ear |
| Weight per bud | 5.6 g | 5.4 glead |
| Water resistanceⓘ | IPX4 | IPX4 |
Audio
| Spec | Anker - Liberty 4 Pro | Sony - WF-1000XM6 |
|---|---|---|
| Driver sizeⓘ | 10.5 mmlead | 8.4 mm |
| Active noise cancellationⓘ | true | true |
| Transparency mode | true | true |
| Spatial audioⓘ | false | truelead |
Battery
| Spec | Anker - Liberty 4 Pro | Sony - WF-1000XM6 |
|---|---|---|
| Battery — buds | 10 hlead | 8 h |
| Battery — with case | 40 hlead | 32 h |
| Wireless case chargingⓘ | true | true |
Connectivity
| Spec | Anker - Liberty 4 Pro | Sony - WF-1000XM6 |
|---|---|---|
| Bluetoothⓘ | 5.4 | 5.4 |
| Codecsⓘ | LDAC,AAC,SBC | LDAC,LC3,AAC,SBC |
| Multipointⓘ | true | true |
| In-ear detection | true | true |
Frequently asked
Which has longer battery, Liberty 4 Pro or WF-1000XM6?+
Liberty 4 Pro lasts 10h per charge vs 8h.
Do Liberty 4 Pro or WF-1000XM6 support multipoint?+
Both support multipoint pairing.
Which has ANC, Liberty 4 Pro or WF-1000XM6?+
Both models have active noise cancellation.