IOA is one of the only parks I've been to where every type of thing they have is top notch. My favorite part is the great water rides. Dudley Do-Right has to be the best flume right now. As well as Popeye being the best of it's kind. IMHO IOA has:Best Theming(overall), Simulator(Spiderman), Flume(DDR), another top 10 flume(JPRA), Raft Ride(Popeye), 2 top 10 coasters(Hulk,DD), Top 5 kids area(Suess Landing), Dark Ride(Cat in the Hat, Spiderman), and a Top 5 park(my #2). Even though I've not been to BGT, I think IOA will be best. You won't be disappointed.