The coasters at US/IOA are definitely more "intense" in my opinion than anything at WDW, aside from Rockin' Rollercoaster, which I rate as "ok". The launch is cool, but nowhere near as cool as the launch for Hulk and I think it is a bit rough...but then, I don't care much for barrel rolls as I don't enjoy having my ears boxed!

IMO all of the coasters offer something a little different and I would rate RRC as a good first inverted coaster...sort of training wheels for Hulk and Dragons!

Hulk has 7 inversions...so it's not wimpy...but it is very smooth...Dragons I find to be rougher, with fewer inversions but the near miss as they duel is awesome, and you have to do front row at least once. I prefer Ice to fire, but you have to do both I'd say...Ice has a little extra dip that I enjoy. You get more of a feel for being UP high on dragons as the lift is slow so you SEE that you're high. I prefer to take one ride on ice and hit the alchemy at happy hour while my kids and husband ride the repeats though, guess I'm getting old!

Kraken is great, but I don't know if I'd consider it to be more intense than Hulk or dragons...just different...and higher, I think...
Once you've been inverted though, it's no big deal...I remember being scared to death of them all at one time...which is hard to imagine now!
Mummy is very cool...but the intensity is nowhere near Hulk, dragons or RRC, IMO.
Make sure to do front row on Hulk as well...the view is fantastic!
Karen / MsDis / MrsMIB999999