I would say it depends if the girls like rides. If so, then I would say Universal/IOA. While I don't think the parks compare to Disney the rest of my family really enjoy Universal/IOA since they love thrill rides (kids are 8 and 10).
I even talked/begged hubby into humiliating his old self for the Fear Factor show for my own amusement

Anyway I, personally, walked around with my nose in the air thinking "Disney would have done this much better".
If they aren't into rides, specifically thrill rides, then I would chose SeaWorld/Aquatica. I don't know when you are planning to go but we found that last March Break when we went to Aquatica that it was a bit cool for us. It is more opened than Typhoon Lagoon and we all felt a bit chilled that day. It was also overcast and that didn't help.
I'm glad we went to Aquatica but personally, I feel that Typhoon Lagoon beats it with its more tropical feel. And if you think you are going to see dolphins when you go down that slide, well I hope your brain processes images very quickly.
Aquatica seemed more opened, almost like a big parking lot. A few things that Aquatica has that are excellent are the rapid river instead of the typical lazy river. Loved that. Also, since it was the last day we were in Florida and we had already checked out of our villa, I was able to have a real shower in the bathroom (hair issues) before heading to the airport. They have big, private shower stalls, complete with shampoo and soap. Very clean bathrooms which I hope they have kept up.
Again, I have to say my hubby liked Aquatica more than TL so there you go (he probably thinks it is cheaper).
Anyway, these are my random thoughts on the subject.