Thats sick! Ski brands should have things like these. Would help out a lot of people and help simplify the process instead of writing long ass propaganda blurbs for their skis.
Different shape (the key has some camber while the wet doesn't have as much and the wet has a ton more rocker than the key), different dimensions (The key is 128mm/95mm/118mm while the wet is symmetrical 116-88-116), the key is a bit stiffer and better for jumps. All of this info is available on their website.