Casio G-Shock GMA-S2100 (small) vs Casio MRW-200H

Side-by-side comparison of specifications and features

CasioG-Shock

GMA-S2100 (small)

CasioMRW-200H

MRW-200H-1B

Key Differences

Best Value

Casio MRW-200H (MRW-200H-1B)

Starting from $49

Best Water Resistance

Casio G-Shock (Ref. GMA-S2100 (small))

200m (2x more)

Price Comparison

Casio G-Shock

MSRP

$150

New

$128

Used

$103

Casio MRW-200H

MSRP

$49

Used

$87

MSRP New (Amazon) Used (eBay)

Comparison of Casio G-Shock, Casio MRW-200H
Specification	Casio G-Shock	Casio MRW-200H
Pricing
MSRP	$150	$49
New Price	$128	N/A
Used Price (Low)	$103	$87
Used Price (High)	$866	$95
30-Day Trend	↑ +3.6%	↑ +200.5%
Used Price Range	$103 - $866	$87 - $95
Identity
Reference	GMA-S2100 (small)	MRW-200H-1B
Nickname	N/A	N/A
Style	Ana-Digi, Sports, Tool	Sports, Casual, Tool
Release Era	1980s	2000s
Dimensions
Diameter	42.9mm	44.2mm
Thickness	N/A	N/A
Lug Width	N/A	N/A
Lug to Lug	N/A	N/A
Movement
Movement	Quartz	Quartz
Power Reserve / Battery	N/A	N/A
Accuracy	N/A	N/A
Case
Case Material	Resin	Resin
Crystal	Mineral Crystal	Acrylic
Water Resistance	200m (diving)	100m (recreational diving)
Bezel	Fixed	Fixed
Dial
Dial Color	Black	Black
Luminous	Yes	Yes
Community
Review Rating	N/A	N/A
In Collections	N/A	N/A
On Wishlists	N/A	N/A
Forum Threads	N/A	N/A

Quick Summary

If you are deciding between Casio G-Shock GMA-S2100 (small) and Casio MRW-200H, the real decision is usually about water-ready utility versus dressier everyday wear, ana-digi character versus sports versatility, entry price versus premium finishing or specs. Treat it as a value-versus-upgrade decision — confirm the extra spend solves a problem you will notice every week.

How to choose

The biggest practical difference is usually movement and upkeep. Start with wrist fit and movement preference, then use water resistance and price to break the tie.

Casio G-Shock GMA-S2100 (small)

Casio G-Shock GMA-S2100 (small) is a better fit for low-maintenance daily wear, ana-digi styling.

Casio MRW-200H

Casio MRW-200H is a better fit for low-maintenance daily wear, sports styling.

Key Differences

Movement and upkeep

Casio G-Shock GMA-S2100 (small): quartz movement

Casio MRW-200H: quartz movement

Both use the same movement type, so maintenance differences are limited and fit or feature details should decide the purchase.

Size and wearability

Casio G-Shock GMA-S2100 (small): 42.9mm

Casio MRW-200H: 44.2mm

Their size profiles are relatively close, so fit comes down to shape, weight, and how each watch sits on your wrist.

Water resistance

Casio G-Shock GMA-S2100 (small): 200m

Casio MRW-200H: 100m

Water resistance is a meaningful separator here — the higher-rated option gives more flexibility for swimming or rougher daily use.

Price and value

Casio G-Shock GMA-S2100 (small): $128

Casio MRW-200H: $49

There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.

Style and use case

Casio G-Shock GMA-S2100 (small): ana-digi

Casio MRW-200H: sports

Casio G-Shock GMA-S2100 (small) leans more ana-digi, while Casio MRW-200H pulls toward sports use case — pick the one that matches how you will actually wear it.

Crystal and materials

Casio G-Shock GMA-S2100 (small): mineral crystal · resin

Casio MRW-200H: acrylic crystal · resin

Crystal choice can change long-term wear expectations — one may prioritize scratch resistance while the other keeps cost or vintage feel in check.

Choose Casio G-Shock GMA-S2100 (small) If...

Swimming, beach use, or tougher daily wear is part of the plan.
You are specifically shopping for a ana-digi style watch.
You are comfortable paying more for a stronger feature set.

Choose Casio MRW-200H If...

You are specifically shopping for a sports style watch.
You want the lower current entry price.

Price and Value Notes

Casio MRW-200H is often the value play at current pricing, while Casio G-Shock GMA-S2100 (small) makes more sense if you will use its extra features regularly.

There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.

Where to Check Deals

Check current deals on Amazon and eBay using the buttons below — listing prices, seller quality, and condition can change quickly.

Check current deals on Amazon and eBay

Prices change often, so compare the latest listings and condition options before you buy.

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Casio G-Shock

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $137 · Live listings

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Casio MRW-200H

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $90 · Live listings

Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.

Comparison FAQ

Which one is better for smaller wrists?

Neither is clearly smaller: case width is 42.9mm vs 44.2mm. Pick on strap and looks instead — the size difference is not what will decide this for you.

Which is better for swimming or rough daily wear?

Casio G-Shock GMA-S2100 (small) — it is rated 200m versus 100m. Both are in the same broad bracket, so treat this as a tiebreaker rather than a deciding factor.

Is the more expensive one worth it?

Casio MRW-200H is the value pick at roughly $79 less. Pay more only if a specific difference above matters to you — otherwise the cheaper one is the smarter buy. Confirm live listings, since marketplace pricing moves.