Hi, I have paddled both models of the Swordfish and the old V10S. I love the new Swordfish S. I believe it has exactly the same hull as the old Swordy however they have moved the seat forward, lowered the hump and moved the rudder slightly forward also. They have also redesigned the seat shape which I find much more comfortable.
In comparison to the old V10S if find the new Swordy handles better and picks up runs more easily. I haven't had the chance to try the new V10S though.
After many years of paddling Fenn Elite skis the Swordfish S is my go to ski these days. Its a good fast fun ski.