Which is cheaper, the Robot Watches AURA SUNRAY or the Sartory Billard SB04-E?

At MSRP the Sartory Billard SB04-E is the cheaper of the two at $3,100, against $3,100 for the Robot Watches AURA SUNRAY — a $0 gap before any retailer discounting.

Which is bigger, the Robot Watches AURA SUNRAY or the Sartory Billard SB04-E?

The Sartory Billard SB04-E wears larger at 39.5mm versus 39mm for the Robot Watches AURA SUNRAY — a 0.5mm difference across the dial.

Which has better water resistance, the Robot Watches AURA SUNRAY or the Sartory Billard SB04-E?

The Sartory Billard SB04-E is rated to 100m versus 50m for the Robot Watches AURA SUNRAY.

Which has a longer power reserve, the Robot Watches AURA SUNRAY or the Sartory Billard SB04-E?

The Sartory Billard SB04-E carries a 68-hour power reserve against 65 hours on the Robot Watches AURA SUNRAY.

What movement does the Robot Watches AURA SUNRAY run compared to the Sartory Billard SB04-E?

Both watches run automatic movements — the Robot Watches AURA SUNRAY uses the G100 and the Sartory Billard SB04-E uses the LJP G101ET.

Side by side

Robot Watches AURA SUNRAYvsSartory Billard SB04-E

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

Add a watch

Robot Watches AURA SUNRAY

MSRP $3,100

Sartory Billard SB04-E

MSRP $3,100

Buy from Robot Watches ↗

Buy used on eBay ↗

Buy from Sartory Billard ↗

Buy used on eBay ↗

At a glance

13 of 29 specs differ

Diameter

AURA SUNRAY39mm

SB04-E39.5mm

Power Reserve

AURA SUNRAY65h

SB04-E68h

Water Resistance

AURA SUNRAY50m

SB04-E100m

MSRP

AURA SUNRAY$3,100

SB04-E$3,100

Full specifications

Case

6 specs

Crystal & Dial

3 specs

AR Coating

Inner

Yes

Dial Color

—

Black

Lume

None

Super-LumiNova BGW9

Movement

3 specs

Caliber

G100

LJP G101ET

Power Reserve

65h

68h

Jewels

Pricing

1 specs

MSRP

—

$3,100

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.

Omologatomicro

Arnage

Presage Classic Series “Craftsmanship” Unglazed Arita Porcelain Dial Limited Edition

Ref. spb497j1

40.6mm·Automatic·100m WR

$1,850MSRP

—Used

Horagemicro

Lensman 2

3 watches · 4 variantsLensman

Sous-Marine

6 variantsRef.

37.5mm·Automatic·200m WR

LONGINES MASTER COLLECTION

9 watches · 23 variantsMaster Collection

Quadrata Automatic

4 variantsQuadrata Automatic

42mm·Automatic

$340MSRP

—Used

All alternatives to the AURA SUNRAY →All alternatives to the SB04-E →

Explore the full catalog

Follow this matchup

Get a note when Robot Watches AURA SUNRAY vs Sartory Billard SB04-E 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.

Omologato 24 Heures GMTvsSartory Billard SB04-E Oblvlo NM AutomaticvsSartory Billard SB04-E Horage Lensman 2vsSartory Billard SB04-E Horage Lensman 2 GlobalvsSartory Billard SB04-E Robot Watches AURA SUNRAYvsGrand Seiko SBGR321 Robot Watches AURA SUNRAYvsSeiko Presage Classic Series “Craftsmanship” Unglazed Arita Porcelain Dial Limited Edition

Edit this comparison Add another watch Explore more 38–41mm watches