I wnt from a 550 to the FX1 and it was awsome. The FX is very similar to the Kawi, only with lots of reliable power.
Getting on a Super jet now, it feels so stable, and heavy! If my FX has a major misshap I would look for a round nose, but would not otherwise switch. The biggest prob with the FX is the small pump. You can't modify the motor heavily in the FX or you will run into cavitation problems. But stock power to weight is very good. My FX hull, after reinforcement weighed in at 97 lbs. Stock super is like 140 +/- I think.
The FX uses a lot of similar parts. Both great skis!
Ride both, see what you like, It's just preference.