We were just at both last week. We felt that BB was less crowded than TL, but we did get to BB a bit earlier than we made it to TL. When we entered TL about 11:30, we couldn't find any lounge chairs at all and had to scrounge up some regular chairs and create our own sitting area. We still had a great time. However, the wait time to swim/snorkel with the tropical fish and sharks was over 2 hours, so we didn't do that. Plus, it is only about a 30 yard swim that the lifegaurds somewhat move you along for. The reason the line is so long is they only allow a couple of people in the reef pool at a time. BTW, the biggest shark we saw fromt he submarine was maybe 3 feet long. I am not slamming the experience, but if you are a real snorkeler, you can easily pass this up.
Have a great time.
Oh, I forgot to say my kids are 2 and 5 and absolutely went nuts for the BB kiddie area and family raft ride. Plus, the 5 year old was able to go into the preteen area for som more fun. I thought this park was extreemely well laid out and the chairlift to the top was a life saver late in the afternoon!
Have fun!