I do not know if you will find that much at either.
BB is more very big slides and coasters.
TL has more tame body and tube slide, two pools one of which is a wave pool that has 2 cycles... smaller consistent waves and HUGE waves -- I warn you to make sure to get a life jackets (free) and hold them with the big waves.
TL is a more family park... get there at opening and plan to leave around 12 as it does get very busy... likely you will done before that as I would think when they reach the 7 range they will have more to do if they are not afraid of big slides and tube coasters.
Both have lazy rivers but they take about 20-30 minutes to go around the parks which is forever for kids that age to sit still in a tube.
They would likely have more fun at the resort pool and mini golf if they allow you to use the ticket for that.