Which is cheaper, the Casio GM-B2100SD or the Citizen ATTESA?

At MSRP the Casio GM-B2100SD is the cheaper of the two at $600, against $2,250 for the Citizen ATTESA — a $1,650 gap before any retailer discounting.

Which is bigger, the Casio GM-B2100SD or the Citizen ATTESA?

The Citizen ATTESA wears larger at 44.6mm versus 44.4mm for the Casio GM-B2100SD — a 0.2mm difference across the dial.

Which has better water resistance, the Casio GM-B2100SD or the Citizen ATTESA?

The Casio GM-B2100SD is rated to 200m versus 100m for the Citizen ATTESA.

What movement does the Casio GM-B2100SD run compared to the Citizen ATTESA?

The Casio GM-B2100SD runs a quartz caliber, while the Citizen ATTESA runs a solar (Citizen F950).

Side by side

Casio GM-B2100SDvsCitizen ATTESA

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Add a watch

Casio GM-B2100SD

GM-B2100SD

MSRP $600

See the full GM-B2100SD

Citizen ATTESA

CC4055

MSRP $2,250

Some links are affiliate links — lug2lug may earn a commission at no extra cost to you. Disclosures

At a glance

14 of 29 specs differ

Diameter

GM-B2100SD44.4mm

ATTESA44.6mm

Power Reserve

GM-B2100SD—

ATTESA—

Water Resistance

GM-B2100SD200m

ATTESA100m

MSRP

GM-B2100SD$600

ATTESA$2,250

Full specifications

Case

7 specs

Diameter

44.4mm

44.6mm

Thickness

12.8mm

0mm

Lug-to-Lug

49.8mm

0mm

Lug Width

—

22mm

Material

Stainless Steel

Super Titanium

Finish

—

Water Resistance

200m

100m

Crystal & Dial

3 specs

Crystal

Mineral

Sapphire

AR Coating

Underside

Dial Color

Black

Blue

Movement

3 specs

Caliber

—

Citizen F950

Type

Quartz

Solar

Power Reserve

—

Pricing

1 specs

MSRP

$600

$2,250

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Bertuccimicro

Ballista

DiscussionNot started

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Citizen ATTESAvsElliot Brown CANFORD: 202-004 BERNY BERNY-Men Quartz Fashion Watch-2285VMvsCitizen ATTESA BERNY BERNY-Men Quartz Dress Watch-2825MvsCitizen ATTESA Citizen ATTESAvsElliot Brown DHU Special Edition Canford Casio GM-B2100SDvsCWC [VAULT] Cabot Sea Falcon Chrono Diver Watch Elapsed-Time Casio GM-B2100SDvsCWC (Cabot Watch Company) Sea Falcon Chrono Diver Watch Elapsed-Time

Edit this comparison Add another watch More sport comparisons Best Sport Watches Under $1,000 Explore more 43–46mm watches

Casio GM-B2100SDvsCitizen ATTESA

At a glance

Full specifications

More watches worth a look

A-5S Ballista Illuminated

Chronotimer Chronograph

A-4T Super Yankee Illuminated

Hawker Hunter Duke Meca-Quartz Chronograph

[VAULT] Cabot Sea Falcon Chrono Diver Watch Elapsed-Time

Promaster Skyhawk A-T

Sea Falcon Chrono Diver Watch Elapsed-Time

Promaster Professional Diver

People also compared