It's supposed to be much harder to cam out with JIS, unless you try to use a Philips screwdriver on a JIS screw (which will most definitely cam out and chew up)

It's supposed to be much harder to cam out with JIS, unless you try to use a Philips screwdriver on a JIS screw (which will most definitely cam out and chew up). I treated myself to a JIS screwdriver, for the rare occasions I adjust my (Japanese) bicycle groupset. JIS, as far as I know, is the technically superior cross-head design.