Looking for an honest Amazfit GTR 4 vs Casio G-Shock GBM-2100 comparison in 2026? We scored both smartwatches on the same six-dimension framework — performance, battery, display, camera, design and value — using identical methodology, so the numbers below are directly comparable. In our overall scoring the Casio G-Shock GBM-2100 comes out ahead 35/100 to 49/100 — a 14-point gap. The widest gap is in battery life, where the Casio G-Shock GBM-2100 pulls noticeably ahead. Both products sit in the same price band (around $200), so this comparison comes down to spec preference rather than budget.

Amazfit
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Casio G-Shock GBM-2100 edges out the Amazfit GTR 4 in the smartwatches category, especially in battery life (300h vs 14h battery), scoring 49 vs 35. If you want the better overall smartwatches, Casio G-Shock GBM-2100 is the recommended choice.
Picking Casio G-Shock GBM-2100 over Amazfit GTR 4 means trading these off.
$199
Scores are relative within the smartwatchescategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
✓ Pros
✗ Cons
✓ Pros
✗ Cons
| Spec | Amazfit GTR 4 | Casio G-Shock GBM-2100W |
|---|---|---|
| Display | 1.43"✓ | 1.2" |
| Display Type | AMOLED | — |
| OS | Zepp OS | — |
| Heart Rate | Yes | — |
| SpO2 | true | — |
| ECG | true | — |
| GPS | Yes | — |
| Battery Life | 14hrs | 300hrs✓ |
| Bluetooth | 5.0 | — |
| NFC | Yes | — |
| Water Resistance | 5ATM | — |
| Weight | 34g✓ | 51g |
| Price | 199$✓ | 200$ |
Buy Amazfit GTR 4 if…
The Amazfit GTR 4 is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Buy Casio G-Shock GBM-2100 if…
Buy the Casio G-Shock GBM-2100 if you want the best overall value in this comparison. It scores higher overall and is the recommended choice for most buyers.
Casio G-Shock GBM-2100 edges out the Amazfit GTR 4 in the smartwatches category, especially in battery life (300h vs 14h battery), scoring 49 vs 35. If you want the better overall smartwatches, Casio G-Shock GBM-2100 is the recommended choice.
No, Casio G-Shock GBM-2100 scores higher (49 vs 35).
Amazfit GTR 4 is cheaper at $199 vs $200 for the Casio G-Shock GBM-2100.
The Amazfit GTR 4 is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Buy the Casio G-Shock GBM-2100 if you want the best overall value in this comparison. It scores higher overall and is the recommended choice for most buyers.
Casio G-Shock GBM-2100 lasts longer with 300 hours vs 14 hours for the other.
Amazfit GTR 4 has the larger display (1.43" vs 1.2").
Amazfit GTR 4 is lighter at 34g vs 51g.
Reviewed by VersusMatrix Editorial Team
Last updated: May 10, 2026
Methodology: AI-powered analysis of technical specifications from manufacturer data. Scores are calculated by comparing products across multiple dimensions and normalized relative to the full category database. Our editorial process is independent and not influenced by affiliate partnerships.