Casio G-Shock GA-B2100 CasiOak vs Casio G-Shock DW-5600 Square
Two divers compared — $100–$150 vs $50–$100
Quick Verdict
The Casio G-Shock DW-5600 Square ($50–$100) delivers Casio Digital Quartz (Battery) technology in the tier below the Casio G-Shock GA-B2100 CasiOak ($100–$150). The G-Shock DW-5600 Square measures 42.8mm (Square) and is rated 200m (20 ATM). The G-Shock GA-B2100 CasiOak justifies its premium with Made in Japan heritage and Quartz Module 5689 (Tough Solar + Bluetooth). Both represent excellent choices in the diver category.
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Specifications Compared
| Feature | Casio G-Shock GA-B2100 CasiOak | Casio G-Shock DW-5600 Square |
|---|---|---|
| Price | $100–$150 | $50–$100 |
| Case Size | 45.4mm (48.5mm lug-to-lug, 11.9mm thick) | 42.8mm (Square) |
| Movement | Quartz Module 5689 (Tough Solar + Bluetooth) | Quartz Module 3229 |
| Caliber Type | Casio Quartz (Solar-Powered) | Casio Digital Quartz (Battery) |
| Power Reserve | About 7 months on a full charge without light; about 18 months in power-saving (Casio) | 2-Year Battery |
| Water Resistance | 200m (20 ATM) | 200m (20 ATM) |
| Crystal | Mineral Glass | Mineral Glass |
| Case Material | Carbon Core Guard Resin | Resin |
| Origin | Made in Japan | Casio (Japan) |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Casio's approach
The Casio G-Shock GA-B2100 CasiOak features a Carbon Core Guard Resin case at 45.4mm (48.5mm lug-to-lug, 11.9mm thick) with Mineral Glass protection. The Casio G-Shock DW-5600 Square offers Resin construction at 42.8mm (Square) with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Quartz Module 5689 (Tough Solar + Bluetooth) vs Quartz Module 3229
The G-Shock GA-B2100 CasiOak runs the Quartz Module 5689 (Tough Solar + Bluetooth) (Casio Quartz (Solar-Powered), About 7 months on a full charge without light; about 18 months in power-saving (Casio) power reserve) at standard frequency. The G-Shock DW-5600 Square uses the Quartz Module 3229 (Casio Digital Quartz (Battery), 2-Year Battery reserve) at standard. The G-Shock GA-B2100 CasiOak edges ahead on power reserve.
Wearability & Fit
45.4mm (48.5mm lug-to-lug, 11.9mm thick) vs 42.8mm (Square) — different wrist presence
At 45.4mm (48.5mm lug-to-lug, 11.9mm thick), the G-Shock GA-B2100 CasiOak has a bolder wrist presence compared to the G-Shock DW-5600 Square at 42.8mm (Square). Water resistance differs: 200m (20 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Casio G-Shock GA-B2100 CasiOak sits at $100–$150 and the Casio G-Shock DW-5600 Square at $50–$100. On the specs that outlast any price: the G-Shock GA-B2100 CasiOak uses Mineral Glass with About 7 months on a full charge without light; about 18 months in power-saving (Casio), against Mineral Glass and 2-Year Battery on the G-Shock DW-5600 Square. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 200m (20 ATM)
The G-Shock GA-B2100 CasiOak is rated to 200m (20 ATM) while the G-Shock DW-5600 Square handles 200m (20 ATM). Both offer identical water resistance ratings.
Our Verdict
Casio
G-Shock GA-B2100 CasiOak
Choose the Casio G-Shock GA-B2100 CasiOak if you prioritize Casio Quartz (Solar-Powered) engineering, Made in Japan craftsmanship, and 200m (20 ATM) water resistance. At $100–$150, it delivers Quartz Module 5689 (Tough Solar + Bluetooth) with About 7 months on a full charge without light; about 18 months in power-saving (Casio) power reserve.
Check Price on AmazonCasio
G-Shock DW-5600 Square
Choose the Casio G-Shock DW-5600 Square if you value Casio Digital Quartz (Battery) technology, Casio (Japan) heritage, and 42.8mm (Square) proportions. At $50–$100, the Quartz Module 3229 with 2-Year Battery power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio G-Shock GA-B2100 CasiOak and Casio G-Shock DW-5600 Square represent two distinct approaches to the diver category — the Casio bringing Made in Japan tradition while Casio delivers Casio (Japan) engineering.
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How This Page Was Made
Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.