freeride, fun, fuse, varun
They are all going to be about the same with some minor differences.
The varun looks like it's got the most defined kick rocker, and the rest look like they've got a more gradual rocker. So I'd say the varun will probably be marginally slower, and paddle a bit more like a brick.....
The JK fun is obviously the most popular of this genre of boats. I'd say the 2 "best of the bunch" are the fun and the freeride.
If I were you, I'd just demo all of them, and see what you like the best. They'll all perform fairly similarly, though.