RE: 7.5m severne sail ??
If you want it for throwing around and a softer feel, choose the Gator. If you want it for a crisper and more efficent feel (but not quite so bulletproof) choose the NCX. NCX has the bigger foot area, making it more freeride, less freemove oriented. Both are relatively grunty, neither lacking in bottom end planing power.
Cheers ~ Ian