From working on skis I've had and my friend's skis, from a construction standpoint it seems like on3p makes skis considering that mountains are made of scraggly rocks that dine on ptex, steel, and wood while other brands make skis considering that mountains get covered in snow and the only thing skis have to do is slide on it.
I'm pretty high so I don't know if that will make sense, but my Jeffrey's and my Wrens get the most abuse of all my skis and yet they are the least fucked up. And I ski/land on/crash into a loooooooot of rocks.