How old are the boys? We went to TL when DS was 9 and DD was 2.5. They both had a blast. DH took DS on the coaster slides while I swam and played with DD in the pool that is there by it, and then we switched places. Then I took DD into the children's play areas while DH and DS did the other big slides. DD absolutely loved the little water slide they had there. They get on a little tube and go down a small stream and she rode it at least 20 times, I swear. Then, after the guys were done, we met up again and all went into the wave pool. DD and I stayed in more shallow water, but they both loved the tides.
We took DS to BB when he was 5, and he liked it. There was a nice play area there for kids and he had a good time. He was not tall enough for summitt plummitt at the time and was bummed that he couldn't ride on it.
When you ask him, he says TL is better, however, he would love to do summitt once.