We are fans of both, each one is different! The TL whoosh of the wave makes us giggle and look up every time! My five year olds just went to BB this past time and liked the different obstacles but weren't yet big enough to be absolutely comfortable. Given your ages and if they can swim, I would go with BB. There is the pulley thing, quick, straight slides, and bigger windier slides. Both parks have lazy rivers. TL is great for babies-4yrs! To relax is TL!. The BB pool was over my kids' heads so I always had to be looking at all times!