Wet n Wild has more thrilling and unique slides,but less theming,atmosphere and lack of shade.Aquatica is pretty new,nicer but in all honestly feels a bit small when compared to the Disney parks.The slide through the pool at Aquatica is good to bring people into the parks but honestly isn't that big a deal.Wet n Wild also offers something that none of the waterparks in the area offer,the knee-ski attraction around their lake,which is like one of my favorites.If you want a nicer environment go to Aquatica,however remember with it being a newer park and not as many slides,the waits for the slides may be longer than at Wet n Wild.If you want a not as nice park but more slides that are more thrilling and possibly less wait time for the slides then choose Wet n Wild.