Replying to 4frnt YLE VS. shreditor 112 VS. shreditor 102

Whats gucci NS!
I need some new pow/all mountain skis and I narrowed it down to these three (keep in mind I'm buying last years) and will like a comparison between the three. I need a pow ski that can also carve pretty well and can also shred a little bit in the park from time to time (I have my pure park). I consider myself an advance skier Im 6'0 (still growing a little bit) and 140 (skinny motherfucker). I ski at Mt. hood and sun valley( this is where the carving comes in to play). Also size wise for the three, for the YLEs I was thinking 187s but for the Shreditors I dont know if I should go with the 179s or the 189s.
Thanks and +k for good answers