long ski:
Pros. Faster, deep carve (it feels better), better in pow, more stable, and easier landings on big jumps.
Cons: More swing wait, hard to butter, Longer radius turns. and harder to balance on rails
short skis:
Pros: Short turning radius, Quicker butters, better to balance on rails. I think it is quicker on the tight trees. Like REALLY TIGHT.
Cons: the pros of a long skis