Casio Duro vs Casio G-Shock GA-B2100

Side-by-side comparison of specifications and features

CasioDuro

MDV-106

CasioG-Shock GA-B2100

GA-B2100-1A1

Key Differences

Best Value

Casio Duro (MDV-106)

Starting from $83

Price Comparison

Casio Duro

MSRP

$85

New

$83

Used

$84

Casio G-Shock GA-B2100

MSRP

$150

New

$177

Used

$130

MSRP New (Amazon) Used (eBay)

Comparison of Casio Duro, Casio G-Shock GA-B2100
Specification	Casio Duro	Casio G-Shock GA-B2100
Pricing
MSRP	$85	$150
New Price	$83	$177
Used Price (Low)	$84	$130
Used Price (High)	$385	$304
30-Day Trend	↑ +15.8%	↑ +0.6%
Used Price Range	$84 - $385	$130 - $304
Identity
Reference	MDV-106	GA-B2100-1A1
Nickname	N/A	N/A
Style	Diver, Casual	Sports, Tool
Release Era	2020s	2000s
Dimensions
Diameter	44mm	45mm
Thickness	N/A	N/A
Lug Width	N/A	N/A
Lug to Lug	N/A	N/A
Movement
Movement	Quartz	Solar Powered
Power Reserve / Battery	N/A	N/A
Accuracy	N/A	N/A
Case
Case Material	Stainless Steel	Resin
Crystal	Mineral Crystal	Mineral Crystal
Water Resistance	200m (diving)	200m (diving)
Bezel	Unidirectional rotating	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 Duro and Casio G-Shock GA-B2100, the real decision is usually about mechanical feel versus low-maintenance convenience, diver 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 Duro

Casio Duro is a better fit for low-maintenance daily wear, diver styling.

Casio G-Shock GA-B2100

Casio G-Shock GA-B2100 is a better fit for low-maintenance daily wear, sports styling.

Key Differences

Movement and upkeep

Casio Duro: quartz movement

Casio G-Shock GA-B2100: solar movement

Casio Duro uses a quartz movement, while Casio G-Shock GA-B2100 uses a solar movement — that changes day-to-day ownership, upkeep, and the overall feel on the wrist.

Size and wearability

Casio Duro: 44mm

Casio G-Shock GA-B2100: 45mm

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

Water resistance

Casio Duro: 200m

Casio G-Shock GA-B2100: 200m

Water resistance is similar on paper, so focus on fit, features, and price instead.

Price and value

Casio Duro: $83

Casio G-Shock GA-B2100: $177

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 Duro: diver

Casio G-Shock GA-B2100: sports

Casio Duro leans more diver, while Casio G-Shock GA-B2100 pulls toward sports use case — pick the one that matches how you will actually wear it.

Crystal and materials

Casio Duro: mineral crystal · steel

Casio G-Shock GA-B2100: mineral crystal · resin

Materials are broadly similar, so finish, fit, and price will matter more than the materials list alone.

Choose Casio Duro If...

You want a lower-maintenance daily watch.
You are specifically shopping for a diver style watch.
You want the lower current entry price.

Choose Casio G-Shock GA-B2100 If...

You want a lower-maintenance daily watch.
You are specifically shopping for a sports style watch.
You are comfortable paying more for a stronger feature set.

Price and Value Notes

Casio Duro is often the value play at current pricing, while Casio G-Shock GA-B2100 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 Duro

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $130 · Live listings

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Casio G-Shock GA-B2100

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $202 · Live listings

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

Comparison FAQ

Which movement is easier to live with day to day?

Quartz and solar models are usually easier for grab-and-go use, while automatic and manual watches appeal more to buyers who enjoy the mechanical side of watch ownership.

Which one is better for smaller wrists?

Start with case width and lug-to-lug. The watch that looks smaller on paper is often the safer choice, but lug shape and thickness still affect how it wears.

Which is better for swimming or rough daily wear?

Use the water resistance row as the first filter. Higher ratings generally give more flexibility for swimming and water exposure, but strap choice and overall condition still matter.

Should I choose based on price alone?

Price matters, but the better buy is the watch that matches your fit, feature priorities, and use case. Check live listings first, then decide whether the price gap actually changes the ownership experience.