HAA YOUZA ALL BACKSEAT IN BOTH!
And one post up, from the one run I had on EPs(in untouched pow up top, more lines in it lower and soft crud down low), I really hated how the EPs sort of hit you when you would go hard over another track between two untouched pow patches, if that makes sense(it was medium to high water content snow, so maby it made that "hit" worse). I also remember them not being fun in that loose crud, which on pretty much any ski(from hellbents to even Rossi Blast a few years back) I love since it's about the fastest(fun) condition.
And One Lifes are the most versatile pow-jib ski of every kind I've been on(I've been on lots), and I think of all the others too. In epic untuouched pow they aren't the best(they're still great, but the extra waste width and taper of others makes them more surfy which I like(especially since I spend half my days now on 202 Lotus 138s)), but they charge the best of all of the skis in that category IMO, and ski skied out pow the best. The small camber, bigg straight rocker, stiffness and skinny(er) waste is what does it..
My vote would be for Moment Night Trains for you!(but I haven't been on them yet, just basing on other skis I have been on).