In the hand, G-10 can feel more "slick" than Micarta, although I don't usually notice an appreciable difference. I find that Micarta is more tactile when wet. Micarta seems to be pretty good in no matter how well it's machined, whereas it seems like crappy G10 is pretty worthless (i.e. it has to be GOOD G10). Luckly, with busse kin knives, the G10 is always pretty good. Micarta also absorbs water, so I'm not sure how it would handle wet/freezing conditions.

I prefer Micarta on my slab-handled fixed blades because it looks a bit more traditional. G10 is great on folders