they PE's i guess perform like the other skis that you mentioned, but the mojo 80, and the AR6 are more towards park. to me, the Karma is the same ski as the PE. i think that it is over priced. they perform exactly alike. i didnt see a difference.
PEs are the most lifeless dead piece of shit skis ive ever tried. But i am in love with every single other k2 ski, tho i havent skied all of them so im just claiming.
wow... i love my PEs my 06/07s! They don't seem as fast edge to edge as my 04/05s but they hold an edge like no other park ski and are soooo sweet in the park. Once you break them in they get pretty soft in the tip and tail (enough to butter into things) but are stiff enough to really throw around out of the park as well. From what I hear the ar6s are nice as well... probably better in the park but not as stiff for out of park things?