I owned both at the same time and it's a tough call. Both are fun and versatile all mountain decks. The Gnu gets the edge on ice with the magnetraction but the Proto has more pop.
18 Rossignol Sushi . 17 Arbor Terrapin . 17 Lib x Lost Mayhem Short Fat . 17 Capita Spring Break Slush Slasher . 16 Never Summer Swift . 14 TJ Brand Retro Fish
17 Union Ultra . 17 Rome Katana . 17 Burton Malavita Wing . 16 Burton Genesis X
16 Flow Talon