Samsung - Galaxy Watch 6 Classic vs Google - Pixel Watch 3 (45mm)
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Samsung - Galaxy Watch 6 Classic | Google - Pixel Watch 3 (45mm) |
|---|---|---|
| Weight | 59 g | 37 g |
| Battery life | 40 h | 36 h |
| Display size | 1.47 " | 1.4 " |
Between the Galaxy Watch 6 Classic and Pixel Watch 3 (45mm), the Galaxy Watch 6 Classic comes out ahead in battery life / display size, while the Pixel Watch 3 (45mm) wins on weight. Overall, the Galaxy Watch 6 Classic scores 66.8 and the Pixel Watch 3 (45mm) scores 69.5 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (66.8 vs 69.5). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the Galaxy Watch 6 Classic 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 life, display size. The single most decisive one: Battery life — 11.11% more. 40 h vs 36 h.
Pick the Pixel Watch 3 (45mm) if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight. The single most decisive one: Weight — 22.00 g less. 37 vs 59.
Both ship with comparable ecg, cellular, spo2, 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: Samsung - Galaxy Watch 6 Classic or Google - Pixel Watch 3 (45mm)?
Google - Pixel Watch 3 (45mm) leads the current Mars Score by 2.7 points.The more useful decision is the trade-off behind that result: compare display size, battery life against the way you will actually use the product.
Choose Samsung - Galaxy Watch 6 Classic if…
Samsung - Galaxy Watch 6 Classic has the measurable edge on battery life h, display size in.
Choose Google - Pixel Watch 3 (45mm) if…
Google - Pixel Watch 3 (45mm) has the measurable edge on weight 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 Samsung - Galaxy Watch 6 Classic wins
- ▲Battery life — 11.11% more. 40 h vs 36 h.
- ▲Display size — 5.00% more. 1.47 " vs 1.4 ".
Why Google - Pixel Watch 3 (45mm) wins
- ▲Weight — 22.00 g less. 37 vs 59.
Spec comparison
Design
| Spec | Samsung - Galaxy Watch 6 Classic | Google - Pixel Watch 3 (45mm) |
|---|---|---|
| Case size | 47 mmlead | 45 mm |
| Weight | 59 g | 37 glead |
| Case material | stainless steel | aluminum |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Display
| Spec | Samsung - Galaxy Watch 6 Classic | Google - Pixel Watch 3 (45mm) |
|---|---|---|
| Display size | 1.47 "lead | 1.4 " |
| Always-on display | true | true |
| Peak brightnessⓘ | 2000 nits | 2000 nits |
Health & Fitness
| Spec | Samsung - Galaxy Watch 6 Classic | Google - Pixel Watch 3 (45mm) |
|---|---|---|
| ECG | true | true |
| SpO2 | true | true |
| Temperature sensor | true | true |
| Sleep tracking | true | true |
| Blood pressure | truelead | false |
Battery & Connectivity
| Spec | Samsung - Galaxy Watch 6 Classic | Google - Pixel Watch 3 (45mm) |
|---|---|---|
| Battery lifeⓘ | 40 hlead | 36 h |
| GPS | true | true |
| Cellular | true | true |
| NFC | true | true |
| OS | WearOS | WearOS |
Frequently asked
Which has longer battery life, Galaxy Watch 6 Classic or Pixel Watch 3 (45mm)?+
Galaxy Watch 6 Classic lasts 40 hours vs 36 hours.
Do Galaxy Watch 6 Classic or Pixel Watch 3 (45mm) support ECG?+
Both support ECG.
Which has cellular, Galaxy Watch 6 Classic or Pixel Watch 3 (45mm)?+
Both offer cellular variants.