Only mice lighter than wmo that I know of are old abyssus and g100s without the weight. New abyssus is same weight as wmo iirc

69g for the G100s sounds like a pretty significant difference from the WMO :O. And it's cheap too

Some people complain about its low malfunction speed, but if you had no problems with wmo speed you shouldn't have problems with g100s. Its actually higher

But doesn't the wmo malfunction in a different way? g100s will snap to ground.

depends on the mousepad, on some pads it stays on the same vertical angle

Yes, but most of them are considerably smaller though. Kinzu v1-v3, roccat Lua, zowie Mico, g100s, abyssus, and a bunch of other lesser known Chinese ones.

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old abyssus (i mean 1st version) is 72g.

new abyssus is 80g but you can remove the weight inside it.