I like TL a lot more and was kinda disapointed with BB because there is no slide roller coaster or experience similar to the shark reef, and the wave pool doesn't have waves nearly as large. Of course, there are two camps to this and others will have equally valid opinions exactly the opposite of mine.
I would think if you just loved waterslides a lot, you may like BB more, I only do each one once really, maybe the tube one a couple times, crush n gusher i can do a lot though. My opinion, upon reflection, may lie in my mild amusement with waterslides in general and TL's more diverse offering in that regard.