G400s is a pure right handed ergo mouse. FK1 is in the old Microsoft Intellimouse style.
No, g400s is heavier and bigger than the fk1. If you use palm grip, then it's not wise to get a fk1
Definetly buy FK1, I can highly recommend. Using it right now, beast mouse if you just claw grip.
if you are used to mouses like g400s, mx518, intelli 3.0 etc u should definitly go for Zowie ec1 (best mouse i have tested in the last couple of years)
Oke nice. I will look into it. EC1 is like the same size etc?