Between the T-Rex 3 and Watch Series 10 (46mm), the T-Rex 3 comes out ahead in battery life and water resistance, while the Watch Series 10 (46mm) wins on display size and weight. Overall, the T-Rex 3 scores 79.7 and the Watch Series 10 (46mm) scores 62.7 on our Mars Score.
Which should you buy?
The T-Rex 3 is the clear pick on raw spec strength, leading by 17.0 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, water resistance.
Pick the Watch Series 10 (46mm) if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are display size, weight, ecg, among others.
Both ship with comparable spo2, peak brightness, 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 — 3633.33% more. 672 h vs 18 h.
- ▲Water resistance — 5.00 ATM more. 10 vs 5.
Why Apple - Watch Series 10 (46mm) wins
- ▲Display size — 36.00% more. 2.04 " vs 1.5 ".
- ▲Weight — 31.60 g less. 36.4 vs 68.
- ▲Has ECG.
- ▲Has Cellular.
Spec comparison
Design
| Spec | Amazfit - T-Rex 3 | Apple - Watch Series 10 (46mm) |
|---|---|---|
| Case size | 48.5 mmlead | 46 mm |
| Weight | 68 g | 36.4 glead |
| Case material | polymer | aluminum |
| Water resistanceⓘ | 10 ATMlead | 5 ATM |
Display
| Spec | Amazfit - T-Rex 3 | Apple - Watch Series 10 (46mm) |
|---|---|---|
| Display size | 1.5 " | 2.04 "lead |
| Always-on display | true | true |
| Peak brightnessⓘ | 2000 nits | 2000 nits |
Health & Fitness
| Spec | Amazfit - T-Rex 3 | Apple - Watch Series 10 (46mm) |
|---|---|---|
| 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 | Apple - Watch Series 10 (46mm) |
|---|---|---|
| Battery life | 672 hlead | 18 h |
| GPS | true | true |
| Cellular | false | truelead |
| NFC | false | truelead |
| OS | Zepp OSlead | watchOS |
Frequently asked
Which has longer battery life, T-Rex 3 or Watch Series 10 (46mm)?+
T-Rex 3 lasts 672h vs 18h.
Do T-Rex 3 or Watch Series 10 (46mm) support ECG?+
Watch Series 10 (46mm) supports ECG; T-Rex 3 does not.
Which has cellular, T-Rex 3 or Watch Series 10 (46mm)?+
Watch Series 10 (46mm) offers a cellular variant; T-Rex 3 is Wi-Fi only.
Spec-level deep dives
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