Casio G-Shock GMA-S2100 (small) vs Tissot PRX

Side-by-side comparison of specifications and features

CasioG-Shock

GMA-S2100 (small)

TissotPRX

T137.410.11.041.00

Key Differences

Best Value

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

Starting from $124

Best Water Resistance

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

200m (2x more)

Biggest Price Drop

Tissot PRX (Ref. T137.410.11.041.00)

-17.0% in 30 days

Price Comparison

Casio G-Shock

MSRP

$150

New

$124

Used

$107

Tissot PRX

MSRP

$375

New

$270

Used

$241

MSRP New (Amazon) Used (eBay)

Comparison of Casio G-Shock, Tissot PRX
Specification	Casio G-Shock	Tissot PRX
Pricing
MSRP	$150	$375
New Price	$124	$270
Used Price (Low)	$107	$241
Used Price (High)	$866	$1,549
30-Day Trend	↑ +6.6%	↓ -17.0%
Used Price Range	$107 - $866	$241 - $1,549
Identity
Reference	GMA-S2100 (small)	T137.410.11.041.00
Nickname	N/A	N/A
Style	Ana-Digi, Sports, Tool	Sports, Dress
Release Era	1980s	2020s
Dimensions
Diameter	42.9mm	40mm
Thickness	N/A	10.4mm
Lug Width	N/A	12mm
Lug to Lug	N/A	44.6mm
Movement
Movement	Quartz	Quartz
Power Reserve / Battery	N/A	N/A
Accuracy	N/A	N/A
Case
Case Material	Resin	Stainless Steel
Crystal	Mineral Crystal	Sapphire Crystal
Water Resistance	200m (diving)	100m (recreational diving)
Bezel	Fixed	Fixed
Dial
Dial Color	Black	Blue
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 Tissot PRX, the real decision is usually about wrist presence versus easier fit, water-ready utility versus dressier everyday wear, ana-digi character versus sports versatility. Start with fit first — case width and lug-to-lug usually matter more than secondary features if wrist comfort is a concern.

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 buyers who want more wrist presence, low-maintenance daily wear, ana-digi styling.

Tissot PRX

Tissot PRX is a better fit for smaller wrists, low-maintenance daily wear, sports styling.

Key Differences

Movement and upkeep

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

Tissot PRX: 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

Tissot PRX: 40mm · L2L 44.6mm

Fit is a real separator here — compare case width and lug-to-lug before deciding, especially if wrist comfort matters more than headline features.

Water resistance

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

Tissot PRX: 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): $124

Tissot PRX: $270

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

Tissot PRX: sports

Casio G-Shock GMA-S2100 (small) leans more ana-digi, while Tissot PRX 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

Tissot PRX: sapphire crystal · steel

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...

You prefer more dial presence and a larger case feel.
Swimming, beach use, or tougher daily wear is part of the plan.
You are specifically shopping for a ana-digi style watch.

Choose Tissot PRX If...

You want a smaller case footprint on the wrist.
You are specifically shopping for a sports style watch.
You are comfortable paying more for a stronger feature set.

Price and Value Notes

Casio G-Shock GMA-S2100 (small) is often the value play at current pricing, while Tissot PRX 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 $140 · Live listings

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Tissot PRX

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $466 · 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?

Tissot PRX — it is 40mm wide versus 42.9mm.

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 G-Shock GMA-S2100 (small) is the value pick at roughly $146 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.