Looking for an honest Casio G-Shock GBM-2100 vs Withings Black SCANWATCH Smartwatch w ECG, HR, O2 Meters 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 28/100 — a 21-point gap. The widest gap is in battery life, where the Casio G-Shock GBM-2100 pulls noticeably ahead. On price the Withings Black SCANWATCH Smartwatch w ECG, HR, O2 Meters undercuts the Casio G-Shock GBM-2100 by 150% ($80 vs $200), which materially changes the value calculus for budget-conscious buyers.
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Casio G-Shock GBM-2100 clearly outperforms the Withings Black SCANWATCH Smartwatch w ECG, HR, O2 Meters in the smartwatches category, especially in battery life (300h vs 30h battery), scoring 49 vs 28. If you want the better overall smartwatches, Casio G-Shock GBM-2100 is the recommended choice.
Picking Casio G-Shock GBM-2100 over Withings Black SCANWATCH Smartwatch w ECG, HR, O2 Meters means trading these off.
Casio
$200
Scores are relative within the smartwatchescategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
✓ Pros
✗ Cons
✓ Pros
✗ Cons
| Spec | Casio G-Shock GBM-2100W | Withings Black SCANWATCH Smartwatch w ECG, HR, O2 Meters |
|---|---|---|
| Display | 1.2" | 1.2" |
| Display Type | — | AMOLED |
| Resolution | — | 454 x 454 pixels |
| OS | — | proprietary |
| Heart Rate | — | Optical HR 24/7 |
| SpO2 | — | Yes (blood oxygen) |
| ECG | — | Yes (FDA approved) |
| GPS | — | true |
| Workout Modes | — | 30+ |
| Swim Proof | — | 50m water resistance |
| Battery Life | 300hrs✓ | 30hrs |
| Bluetooth | — | Bluetooth 5.0 |
| NFC | — | true |
| Case Material | — | Stainless Steel |
| Water Resistance | — | IP68 |
| Weight | 51g✓ | 52g |
| Price | 200$ | 80$✓ |
Buy Casio G-Shock GBM-2100 if…
Buy the Casio G-Shock GBM-2100 if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.
Buy Withings Black SCANWATCH Smartwatch w ECG, HR, O2 Meters if…
Choose the Withings Black SCANWATCH Smartwatch w ECG, HR, O2 Meters if budget is your top priority — it offers competitive specs at a lower price point.
Casio G-Shock GBM-2100 clearly outperforms the Withings Black SCANWATCH Smartwatch w ECG, HR, O2 Meters in the smartwatches category, especially in battery life (300h vs 30h battery), scoring 49 vs 28. 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 28).
Withings Black SCANWATCH Smartwatch w ECG, HR, O2 Meters is cheaper at $80 vs $200 for the Casio G-Shock GBM-2100.
Buy the Casio G-Shock GBM-2100 if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.
Choose the Withings Black SCANWATCH Smartwatch w ECG, HR, O2 Meters if budget is your top priority — it offers competitive specs at a lower price point.
Casio G-Shock GBM-2100 lasts longer with 300 hours vs 30 hours for the other.
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.
