My daughter had her best year on the X7 last year. Moved to the Fusion this year and will go back to X7 next year. If you are technical and smooth, the X7 works and is more forgiving. It works for Nate because he skis "light". If you're 210 lbs on a 67" ski at 34mph it will feel slow. But, if you're 150 on a 67" ski at 36mph, the fact that it sits deeper in the turns is a benefit.
I'll have a 67" X7 for skidawg to ride in the spring along with the revised Fusion (or whatever they will call it) for comparison.