Wow, no replies... I'll jump in as a Freak owner with what I know -
Some of the info is in this thread:
http://www.x-h2o.com/threads/121931-List-of-All-Aftermarket-Hulls&highlight=aftermarket
Previous models:
Superfreak 1 - pretty much superjet based but very light, carbon - perhaps some with minor rocker or shortened length???
Superfreak 1.5 - swoopy gunwales, some rocker, if I'm correct, these were more tippy and not as sweet to ride like the badass.
Superfreak??? (hybrid - rare) pre- Badass - from what I understand has a 1.5 style top deck and a badass style running surface. -rare, prototype'ish-
Current Hulls being built:
Superfreak Badass - the king
freak hull that put Tem on the map IMO. The swiss army knife of hulls from surf to flatwater, boat chasing to backflips. Available in carbon or glass, full length to -10. All-around fun hull to ride in any conditions.
Superfreak Circus - Shorter, lighter, competition backflip hull, carbon. (i've never rode one, so I can't comment on the ride)
Those who know more than me, please chime in and correct if necessary.