Looking for an honest Casio G-Shock GBM-2100 vs Fitbit Versa 4 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 49/100 to 36/100 — a 13-point gap. The widest gap is in battery life, where the Casio G-Shock GBM-2100 pulls noticeably ahead. On price the Casio G-Shock GBM-2100 undercuts the Fitbit Versa 4 by 14% ($200 vs $229), which materially changes the value calculus for budget-conscious buyers.
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Casio G-Shock GBM-2100 edges out the Fitbit Versa 4 in the smartwatches category, especially in battery life (300h vs 30h battery), scoring 49 vs 36. If you want the better overall smartwatches, Casio G-Shock GBM-2100 is the recommended choice.
Picking Casio G-Shock GBM-2100 over Fitbit Versa 4 means trading these off.
✓ Pros
✗ Cons
✓ Pros
✗ Cons
| Spec | Casio G-Shock GBM-2100W | Fitbit Versa 4 |
|---|---|---|
| Display | 1.2" | 1.58"✓ |
| Display Type | — | AMOLED |
| OS | — | Fitbit OS |
| Heart Rate | — | Yes |
| SpO2 | — | true |
| ECG | — | true |
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.
Buy Fitbit Versa 4 if…
The Fitbit Versa 4 is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Casio G-Shock GBM-2100 edges out the Fitbit Versa 4 in the smartwatches category, especially in battery life (300h vs 30h battery), scoring 49 vs 36. If you want the better overall smartwatches, Casio G-Shock GBM-2100 is the recommended choice.
Yes, Casio G-Shock GBM-2100 scores higher overall (49 vs 36).
Casio G-Shock GBM-2100 is cheaper at $200 vs $229 for the Fitbit Versa 4.
Buy the Casio G-Shock GBM-2100 if you want the best overall value in this comparison. It scores higher overall and is the recommended choice for most buyers.
The Fitbit Versa 4 is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Casio G-Shock GBM-2100 lasts longer with 300 hours vs 30 hours for the other.
Fitbit Versa 4 has the larger display (1.58" vs 1.2").
Reviewed by VersusMatrix Editorial Team
Last updated: May 10, 2026
Methodology: AI-powered analysis of technical specifications from manufacturer data. Scores are calculated by comparing products across multiple dimensions and normalized relative to the full category database. Our editorial process is independent and not influenced by affiliate partnerships.
Scores are relative within the smartwatchescategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
| GPS | — | Yes |
| Battery Life | 300hrs✓ | 30hrs |
| Bluetooth | — | 5.0 |
| NFC | — | Yes |
| Water Resistance | — | 5ATM |
| Weight | 51g | 38g✓ |
| Price | 200$✓ | 229$ |
Fitbit Versa 4 is lighter at 38g vs 51g.