Between the T-Rex 3 and Watch GT 6, the T-Rex 3 comes out ahead in battery life and peak brightness, while the Watch GT 6 wins on weight and ecg. Overall, the T-Rex 3 scores 79.7 and the Watch GT 6 scores 63.8 on our Mars Score.
Which should you buy?
The T-Rex 3 is the clear pick on raw spec strength, leading by 15.9 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 T-Rex 3 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, peak brightness, water resistance, among others.
Pick the Watch GT 6 if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight, ecg.
Both ship with comparable cellular, spo2, so those specs don't separate the two — focus on the differences below.
Bottom line: the T-Rex 3 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Amazfit - T-Rex 3 wins
- ▲Battery life — 100.00% more. 672 h vs 336 h.
- ▲Peak brightness — 33.33% more. 2000 nits vs 1500 nits.
- ▲Water resistance — 5.00 ATM more. 10 vs 5.
- ▲Display size — 2.04% more. 1.5 " vs 1.47 ".
Why Huawei - Watch GT 6 wins
- ▲Weight — 16.00 g less. 52 vs 68.
- ▲Has ECG.
Spec comparison
Design
| Spec | Amazfit - T-Rex 3 | Huawei - Watch GT 6 |
|---|---|---|
| Case size | 48.5 mmlead | 46 mm |
| Weight | 68 g | 52 glead |
| Case material | polymer | stainless-steel |
| Water resistanceⓘ | 10 ATMlead | 5 ATM |
Display
| Spec | Amazfit - T-Rex 3 | Huawei - Watch GT 6 |
|---|---|---|
| Display size | 1.5 "lead | 1.47 " |
| Always-on display | true | true |
| Peak brightnessⓘ | 2000 nitslead | 1500 nits |
Health & Fitness
| Spec | Amazfit - T-Rex 3 | Huawei - Watch GT 6 |
|---|---|---|
| ECG | false | truelead |
| SpO2 | true | true |
| Temperature sensor | true | true |
| Sleep tracking | true | true |
| Blood pressure | false | false |
Battery & Connectivity
| Spec | Amazfit - T-Rex 3 | Huawei - Watch GT 6 |
|---|---|---|
| Battery life | 672 hlead | 336 h |
| GPS | true | true |
| Cellular | false | false |
| NFC | false | truelead |
| OS | Zepp OSlead | HarmonyOS |
Frequently asked
Which has longer battery life, T-Rex 3 or Watch GT 6?+
T-Rex 3 lasts 672h vs 336h.
Do T-Rex 3 or Watch GT 6 support ECG?+
Watch GT 6 supports ECG; T-Rex 3 does not.
Which has cellular, T-Rex 3 or Watch GT 6?+
Neither offers cellular.
Spec-level deep dives
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