Casio G-Shock GA-2100 (CasiOak) vs Casio A168WA (Casio Royale)

Both are everyday watches in the entry tier. In short: the Casio G-Shock GA-2100 (CasiOak) takes more water (200m) — the one to pick if you swim or dive. The Casio G-Shock GA-2100 (CasiOak) is quartz, 200m water resistance, 45.4mm, mineral crystal; the Casio A168WA (Casio Royale) is quartz, 30m water resistance, 36mm, acrylic crystal.

Last verified 2026-06-27 · specs from manufacturer data · tier = price band, confirm the live price at the retailer

Spec	Casio G-Shock GA-2100 (CasiOak)	Casio A168WA (Casio Royale)
Movement	Quartz	Quartz
Water resistance	200m	30m
Case size	45.4mm	36mm
Crystal	mineral	acrylic
Style	Everyday / casual	Everyday / casual
Price tier	Entry	Entry

Which should you buy?

The Casio G-Shock GA-2100 (CasiOak) takes more water (200m) — the one to pick if you swim or dive
The Casio G-Shock GA-2100 (CasiOak) has a mineral crystal — more scratch-resistant for daily wear
The Casio G-Shock GA-2100 (CasiOak) wears 45.4mm vs the Casio A168WA (Casio Royale)'s 36mm — choose by wrist size

Where to buy

Casio G-Shock GA-2100 (CasiOak)See price on AmazonCheck price

Casio A168WA (Casio Royale)See price on AmazonCheck price

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FAQ

What's the difference between the Casio G-Shock GA-2100 (CasiOak) and the Casio A168WA (Casio Royale)?
Both are everyday watches in the entry tier. The Casio G-Shock GA-2100 (CasiOak) is quartz, 200m water resistance, 45.4mm, mineral crystal; the Casio A168WA (Casio Royale) is quartz, 30m water resistance, 36mm, acrylic crystal.

Which has better water resistance, the Casio G-Shock GA-2100 (CasiOak) or the Casio A168WA (Casio Royale)?
The Casio G-Shock GA-2100 (CasiOak), rated 200m, versus 30m on the other. Pick 100m or higher for swimming and 200m+ for diving.

Which is better value, the Casio G-Shock GA-2100 (CasiOak) or the Casio A168WA (Casio Royale)?
Both sit in the entry tier, so it comes down to movement, water resistance and case size — see the spec table above.

Citing these specs? Go ahead — manufacturer data, last verified 2026-06-27. Copy a ready-made reference:

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