Which is cheaper, the Casio EFS-S650D or the Zelos GT?

At MSRP the Casio EFS-S650D is the cheaper of the two at $250, against $499 for the Zelos GT — a $249 gap before any retailer discounting.

Which is bigger, the Casio EFS-S650D or the Zelos GT?

The Zelos GT wears larger at 42mm versus 40.9mm for the Casio EFS-S650D — a 1.1mm difference across the dial.

What movement does the Casio EFS-S650D run compared to the Zelos GT?

The Casio EFS-S650D runs a quartz caliber, while the Zelos GT runs a automatic (Miyota 9133).

Side by side

Casio EFS-S650DvsZelos GT

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

Add a watch

Casio EFS-S650D

EFS-S650D

MSRP $250

See the full EFS-S650D

Zelos GT

gt-42mm-azzurro

MSRP $499

See the full GT

Buy from Casio ↗

Buy used on eBay ↗

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

Buy from Zelos ↗

Buy used on eBay ↗

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

At a glance

12 of 29 specs differ

Diameter

EFS-S650D40.9mm

GT42mm

Power Reserve

EFS-S650D—

GT—

Water Resistance

EFS-S650D100m

GT100m

MSRP

EFS-S650D$250

GT$499

Full specifications

Case

6 specs

Diameter

40.9mm

42mm

Thickness

11.7mm

10.8mm

Lug-to-Lug

46.7mm

42mm

Lug Width

—

22mm

Material

Stainless Steel

316L Stainless Steel

Finish

—

Crystal & Dial

2 specs

AR Coating

Yes

—

Dial Color

Black

SS - Azzurro

Movement

3 specs

Caliber

—

Miyota 9133

Type

Quartz

Automatic

Power Reserve

—

Pricing

1 specs

MSRP

$250

$499

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.

Islander Islander Calverton Flight Chronograph Alarm Watch with Black Dial #ISL-282

Islandermicro

Under $50

Follow this matchup

Get a note when Casio EFS-S650D vs Zelos GT gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

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

Knot Watches TSC-40TI ChronographvsZelos GT Duxot Accelero ChronographvsZelos GT Specht & Sohne Specht & Söhne SP0010 QuartzvsZelos GT Henry Archer KvantumvsZelos GT Casio EFS-S650DvsFarer INTEGRA Casio EFS-S650DvsFlux Watches Quadras

Edit this comparison Add another watch More chronograph comparisons Best Chronograph Watches Under $500 Explore more 39–43mm watches

Casio EFS-S650DvsZelos GT

At a glance

Full specifications

More watches worth a look

Islander Calverton Flight Chronograph Alarm Watch with Black Dial #ISL-282

Quadras

Straton Classic Driver MKII

Manhattan 40

INTEGRA

Accelero Chronograph Compax Skeleton Edition

XM Racing

GT Racing Chronograph

Follow this matchup

People also compared