It's so Hard to Choose :[?

If you had to choose, for a family of 4, a 9 yr old, a 12 year old and a mom and a dad, in a septemeber vacation to visit Universal Studio's, SeaWorld, Disney World, should we use that 1 day left to go to Busch Gardens in Tampa, or Wet n Wild in orlando (i think). Which do you like better. Which has better rides for the 9 year old and the 12 year old. (I am the 12 year old)?