Adventure Watches Head to head
Polar Grit X2 vs Amazfit T-Rex 3 Pro
The Polar Grit X2 leads on case weight (no band) and ECG. The Amazfit T-Rex 3 Pro leads on battery, smartwatch use (rated), GPS battery, most accurate mode and water resistance. They are level on dual-frequency GPS, offline maps on the watch, flashlight, sapphire lens and cellular version available. At list price the Amazfit T-Rex 3 Pro is $400 cheaper.
Polar Grit X2
$799.99
Maker's list price, checked Oct 7, 2026
Model 900115134
Leads on 2 of 10 specs
Amazfit T-Rex 3 Pro 48mm
$399.99
Maker's list price, checked Oct 7, 2026
Model T-Rex 3 Pro (48mm)
Leads on 3 of 10 specs
Who leads on specs?
Counted on the 10 specs both makers publish.
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Choose the Polar Grit X2 if
Case weight (no band) and ECG matter more to you than the price difference.
Choose the Amazfit T-Rex 3 Pro if
Battery, smartwatch use (rated), GPS battery, most accurate mode and water resistance matter most, and you want to spend less.
Spec by spec
Every spec side by side. A tick and a green cell mark the better figure.
| Spec | Polar Grit X2 | Amazfit T-Rex 3 Pro | Who leads |
|---|---|---|---|
| List price | $799.99 | $399.99 | Amazfit T-Rex 3 Pro |
| Battery, smartwatch use (rated) | 168 hr | 600 hr | Amazfit T-Rex 3 Pro |
| GPS battery, most accurate mode | 30 hr | 38 hr | Amazfit T-Rex 3 Pro |
| Case weight (no band) | 39.7 g | 52 g | Polar Grit X2 |
| Dual-frequency GPS | Yes | Yes | Level |
| Offline maps on the watch | Yes | Yes | Level |
| Flashlight | Yes | Yes | Level |
| Sapphire lens | Yes | Yes | Level |
| Water resistance | 50 m | 100 m | Amazfit T-Rex 3 Pro |
| ECG | Yes | No | Polar Grit X2 |
| Cellular version available | No | No | Level |
| Case size | 45.7 mm | 48 mm | For information |
