Between the Watch GT 6 and OnePlus Watch 3, the Watch GT 6 comes out ahead in battery life and weight, while the OnePlus Watch 3 wins on peak brightness and display size. Overall, the Watch GT 6 scores 63.8 and the OnePlus Watch 3 scores 53.9 on our Mars Score.
Which should you buy?
The Watch GT 6 is the clear pick on raw spec strength, leading by 9.9 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 Watch GT 6 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, weight.
Pick the OnePlus Watch 3 if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are peak brightness, display size.
Both ship with comparable ecg, cellular, spo2, so those specs don't separate the two — focus on the differences below.
Bottom line: the Watch GT 6 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Huawei - Watch GT 6 wins
- ▲Battery life — 180.00% more. 336 h vs 120 h.
- ▲Weight — 29.00 g less. 52 vs 81.
Why OnePlus Watch 3 wins
- ▲Peak brightness — 46.67% more. 2200 nits vs 1500 nits.
- ▲Display size — 2.04% more. 1.5 " vs 1.47 ".
Spec comparison
Design
| Spec | Huawei - Watch GT 6 | OnePlus Watch 3 |
|---|---|---|
| Case size | 46 mm | 46.5 mmlead |
| Weight | 52 glead | 81 g |
| Case material | stainless-steel | stainless steel |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Display
| Spec | Huawei - Watch GT 6 | OnePlus Watch 3 |
|---|---|---|
| Display size | 1.47 " | 1.5 "lead |
| Always-on display | true | true |
| Peak brightnessⓘ | 1500 nits | 2200 nitslead |
Health & Fitness
| Spec | Huawei - Watch GT 6 | OnePlus Watch 3 |
|---|---|---|
| ECG | true | true |
| SpO2 | true | true |
| Temperature sensor | true | true |
| Sleep tracking | true | true |
| Blood pressure | false | false |
Battery & Connectivity
| Spec | Huawei - Watch GT 6 | OnePlus Watch 3 |
|---|---|---|
| Battery life | 336 hlead | 120 h |
| GPS | true | true |
| Cellular | false | false |
| NFC | true | true |
| OS | HarmonyOSlead | WearOS |
Frequently asked
Which has longer battery life, Watch GT 6 or OnePlus Watch 3?+
Watch GT 6 lasts 336h vs 120h.
Do Watch GT 6 or OnePlus Watch 3 support ECG?+
Both support ECG.
Which has cellular, Watch GT 6 or OnePlus Watch 3?+
Neither offers cellular.
Spec-level deep dives
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