Volkl Mantra or Gotama?

Hi, I am trying to decide between the Volkl Mantra or Gotama. I am 15 and i'm 5'8" and 140lbs. I consider my self a advanced skier. I ski all black diamonds and doubles whenever i can. I do at least a couple 10-15ft cliff jumps every time i go skiing. I love powder and i ski at Alpine Meadows,Kirkwood, and Homewood in California. I want some new skiis and i was looking at the Mantras and The gottamas but i can decide which one to get. Thanks for the help!