Replying to Soft...Hard...What the hell is really the difference?

Heres the deal. I want new skis, again. I have a pair of unused Skogens that I am thinking about selling because some guy just got 330 bucks for a pair on ebay. I ride the old 1080s and I am really breaking them in. They are becoming softer and softer each day it seems, and I am kind of liking it.
I know with a harder, stiffer ski it controls better at high speeds. But how would a soft ski compare if it were used primarily in the park? I mean is there much of a difference from a soft ski to a stiff ski? If not I would just stick with the stiff ones then I could go all mountain. And how stiff (or soft) are the Skogens?...