There are two that are closer to Universal, Watermania and Wet and Wild.
Watermania is a little cheaper, a little less flair, and a little less crowded.
Wet and Wild is a little more expensive, more slides and attractions, and bigger crowds.
Both, however are cheaper than the Disney Water parks.
It's a nice change up from the Disney parks, but the lack of Disney magic is definately a deterrent for me.