Heres my take on them, ive had skullcrushers, TI's, lowriders, and icons. The scullcrushers are legit, i liked them especially cause they were tight on my head and on my ears, sound quality is real good, the bass is stong as hell, but you need a battery for the bass and it dies real quick. also the collapse at the top, i broke mine right there crashing and i feel like it probaly happens alot when riding with them. As far as the TI's go. they look sicker, they are not as tight around your ear/head so you have to put your goggle strap around them. the sound quality is Top notch, but they do beak if you hit your head on the snow the wrong way, ive broken a pair of hese too.
I hope this helped a bit. I would probaly go for GI's cause they are basically TI's but cheaper.
PZ