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Casio F-91W vs Casio G-Shock Mudmaster GG-B100

Both are everyday / casual watches — here's how the specs differ and which to pick.

Last verified 2026-06-11 · specs from manufacturer data · tier = price band, confirm the live price at the retailer

SpecCasio F-91WCasio G-Shock Mudmaster GG-B100
MovementQuartzQuartz
Water resistance30m200m
Case size34mm53mm
Crystalacrylicmineral
StyleEveryday / casualEveryday / casual
Price tierEntryMid

Which should you buy?

Where to buy

Check the Casio F-91W price on Amazon →

Check the Casio G-Shock Mudmaster GG-B100 price on Amazon →

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FAQ

What's the difference between the Casio F-91W and the Casio G-Shock Mudmaster GG-B100?
Both are everyday / casual watches. The Casio F-91W is quartz, 30m water resistance, 34mm, acrylic crystal; the Casio G-Shock Mudmaster GG-B100 is quartz, 200m water resistance, 53mm, mineral crystal.

Which has better water resistance, the Casio F-91W or the Casio G-Shock Mudmaster GG-B100?
The Casio G-Shock Mudmaster GG-B100, rated 200m, versus 30m on the other. Pick 100m or higher for swimming and 200m+ for diving.

Which is better value, the Casio F-91W or the Casio G-Shock Mudmaster GG-B100?
The Casio F-91W is the lower-priced tier; the other steps up in build for more money — confirm both live prices at the retailer.

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