Bingo. The skis aren't comparable. The PE is 85mm underfoot, the BC is 98mm. The Scratch FS is the PE's Rossi cousin.
+ yes, the PE is stiffer, and to me feels like the old K2 Extreme in twin-tip mode: a stiff mofo with forward front flex and a kicker tail. I think it's a covert-operations big mountain ski at old-style width, personally. It's not that hot on ice, but it can hold seriously long shredding turns in pow and chop AND, yah, it can turn fast and quick in bumps and trees with a bit of swivel. It's super decent in pow but if you ask me anything 80mm and over can kick the pow if you've got the skillz. Now I'm not big into rails, it seems to slide well, but I can say that it is very, very solid off kickers and in the pipe, a really nice solid landing. It feels solid in the air. But I've always liked a stiffer, slightly heavier ski.
+ as for durability, the topsheet gets chewed to all hell (I've got a coreshot in the topsheet, wtf), but the edges are durable as all fuck and the base is solid. It IS a K2.
+ now I just bought this year's BC but you'll have to wait until next season to hear how it rides.. ;p