Which is cheaper, the Casio GM-B2100SD or the Omnis Eon?

At MSRP the Casio GM-B2100SD is the cheaper of the two at $600, against $701 for the Omnis Eon — a $101 gap before any retailer discounting.

Which is bigger, the Casio GM-B2100SD or the Omnis Eon?

The Casio GM-B2100SD wears larger at 44.4mm versus 41.5mm for the Omnis Eon — a 2.9mm difference across the dial.

Which has better water resistance, the Casio GM-B2100SD or the Omnis Eon?

The Casio GM-B2100SD is rated to 200m versus 50m for the Omnis Eon.

What movement does the Casio GM-B2100SD run compared to the Omnis Eon?

The Casio GM-B2100SD runs a quartz caliber, while the Omnis Eon runs a automatic (Miyota 8215).

Side by side

Casio GM-B2100SDvsOmnis Eon

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

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Casio GM-B2100SD

GM-B2100SD

MSRP $600

See the full GM-B2100SD

MSRP $701

At a glance

13 of 29 specs differ

Diameter

GM-B2100SD44.4mm

Eon41.5mm

Power Reserve

GM-B2100SD—

Eon48h

Water Resistance

GM-B2100SD200m

Eon50m

MSRP

GM-B2100SD$600

Eon$701

Full specifications

Case

6 specs

Crystal & Dial

3 specs

Crystal

Mineral

Sapphire

AR Coating

—

Dial Color

Black

—

Movement

3 specs

Caliber

—

Miyota 8215

Type

Quartz

Automatic

Power Reserve

—

48h

Pricing

1 specs

MSRP

$600

$701

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