SainSmart Genmitsu L8 20W vs xTool S1 40W

Updated October 2, 2026

SainSmart Genmitsu L8 20W

SainSmart Genmitsu L8 20W

Score 76/100 · from $699 at SainSmart, checked Oct 2

SainSmart · $699
VS
xTool S1 40W

xTool S1 40W

Score 78/100 · from $1,299 at xTool, checked Oct 2

Check price on Amazon

Verdict

On our scores the xTool S1 40W comes out ahead, 78 to 76. The SainSmart Genmitsu L8 20W is a 20 W diode laser with a 400 × 400 mm work area; the xTool S1 40W is a 40 W diode laser with 498 × 319 mm. The SainSmart Genmitsu L8 20W costs about $1,000 less at list price.

The SainSmart Genmitsu L8 20W is best for

Home users who want a 20W diode in a real Class 1 enclosure with camera and air assist in the box.

The xTool S1 40W is best for

Hobbyists and small sellers who want a powerful diode cutter for wood and dark acrylic that is safe to run in a shared space.

Specs and scores side by side

SainSmart Genmitsu L8 20WxTool S1 40W
Laser typeDiode laserDiode laser
FormEnclosedEnclosed
Optical power20 W40 W
Work area400 × 400 mm498 × 319 mm
Max speed40,000 mm/min (about 667 mm/s)600 mm/s
Air assistIncludedIncluded
CameraYesNo
AutofocusNoYes
SafetyClass 1 enclosure with door sensor, flame sensor, tilt protection, emergency stop and key switchClass 1 enclosure with lid-open stop, 5-direction flame detection, emergency stop and key lock; becomes Class 4 with the Class 4 riser base and conveyor
Weightnot published20 kg
Price$699$1,699
Overall score7678
Power score6580
Speed score7266
Ease score8284
Safety score9090
Value score8076

Frequently asked questions

Which is better, the SainSmart Genmitsu L8 20W or the xTool S1 40W?

On our scores the xTool S1 40W comes out ahead, 78 to 76. The SainSmart Genmitsu L8 20W is a 20 W diode laser with a 400 × 400 mm work area; the xTool S1 40W is a 40 W diode laser with 498 × 319 mm. The SainSmart Genmitsu L8 20W costs about $1,000 less at list price.

Which is cheaper, the SainSmart Genmitsu L8 20W or the xTool S1 40W?

At list price the SainSmart Genmitsu L8 20W ($699) costs less than the xTool S1 40W ($1,699).

How we rank: by our own scores for power, speed, ease of use, safety and value, from the maker's published specs and independent tests where they exist. Some links earn us a commission (for example TwoTrees, SainSmart, Gweike and Amazon). That never changes a score or the order of a list (disclosure).

Laser buying guides