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Casio G-Shock GBM-2100 edges out the Amazfit GTS 4 in the smartwatches category, especially in battery life (300h vs 8h battery), scoring 49 vs 40. If you want the better overall smartwatches, Casio G-Shock GBM-2100 is the recommended choice.
Picking Casio G-Shock GBM-2100 over Amazfit GTS 4 means trading these off.
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 GTS 4 | Casio G-Shock GBM-2100W |
|---|---|---|
| Display | 1.75"✓ | 1.2" |
| Display Type | AMOLED | — |
| OS | Zepp OS | — |
| Heart Rate | Yes | — |
| SpO2 | true | — |
| ECG | true | — |
| GPS | Yes | — |
| Battery Life | 8hrs | 300hrs✓ |
| Bluetooth | 5.0 | — |
| NFC | Yes | — |
| Water Resistance | 5ATM | — |
| Weight | 27g✓ | 51g |
| Price | 199$✓ | 200$ |
Buy Amazfit GTS 4 if…
The Amazfit GTS 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 GTS 4 in the smartwatches category, especially in battery life (300h vs 8h battery), scoring 49 vs 40. If you want the better overall smartwatches, Casio G-Shock GBM-2100 is the recommended choice.
No, Casio G-Shock GBM-2100 scores higher (44 vs 65).
Amazfit GTS 4 is cheaper at $199 vs $200 for the Casio G-Shock GBM-2100.
The Amazfit GTS 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 8 hours for the other.
Amazfit GTS 4 has the larger display (1.75" vs 1.2").
Amazfit GTS 4 is lighter at 27g vs 51g.
Reviewed by VersusMatrix Editorial Team
Last updated: April 28, 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.