I can only comment on studs... I rode many years without and NEVER had an issue running ice or trails, until... I hit a patch(unsure what) on a trail doing over 80(unsure what), but long story short I wagged the sled side to side for couple 100 yards before running out of space and barrel rolling it..... If you ride trails more than off-trail personally I would stud your track.... Just my .02.... I won't ride without studs again..... Why? the exclamation to this story is my 9yr old daughter was on the sled with me.....
As for track I like the ripsaw and intense.