They're different parks,Aquatica is the nicer,newer park.Aquatica could be compared more to the Disney waterparks as it's nicely themed,not as large or lush but has good slides,better dining,shopping and kids areas when compared to BB and TL.The coolest thing at Aquatica that can only be found there is the Roa's rapids fast lazy river,many people agree it's unique and the funnest thing at the park.Wet n Wild is more about thrilling slides and unique multi person slides like the Disco H2O where you ride in a 4 person tube in a funnel type slide with lights and music playing.Again you will find little theming,less trees or palms at Wet n Wild but more thrilling slides.I would suggest trying Aquatica as it is a very nice park experience,if your kids are all about thrilling slides and innovative slides but care little about theming try Wet n Wild,it's still a nice park.