I just returned from Texas and visited SW/SA while there. We bought the fun card, so we were there for parts of 3 different days.
It's hard for me to answer your question. Both Sea Worlds are pretty similar (particularly the marine life shows, and Pet Tales has just been added at SA), but I found that I do prefer the one in Orlando. That said, I'm not sure I would pay the cost of admission if I were you and were already going to the one in SA.
We really enjoy the Sharks exhibit at Orlando. You actually go through a plexiglass tunnel with sharks swimming all around you.
On the other hand, SA has more roller coasters.
We enjoyed the new Haunted Lighthouse show at SA, but the motion simulator show (Polar something) is very good at Orl.
Shamu's Happy Harbor is much larger in Orl. None of the water things in the playground were working any of the days that we were in SA.
While SA has the waterpark area, the wave pool rarely made a wave while we were there, and some of the other stuff wasn't operational.
Sorry if I'm not much help!