We've been a few times to SAB and many times to the BW pool. Here are some things you can think about....
SAB (pos.) - lots of fun, sandy bottom, sandy play area, tube rentals, kiddie area has kiddie slide, reg.
SAB (neg.) - spread out - hard to keep an eye on the kids , sections of the pool are hidden from view and deep, slide bigger (and darker -goes through a tube) than Keister Coaster (can be a pos. or neg. depending on your kids), slide entrance is not in view of slide exit, sandy bottom can be annoying
BW Pool (pos.) - lots of fun, normal pool with medium slide where you can see the top of the slide from the pool, elephant spray and kiddie pool, safer because you can keep an eye on your kids from just about anywhere
BW Pool (neg.) - no sand (could also be a pos.

), no kiddie slide, no tubes
I like SAB for one visit during a trip (we used to pool hop when we were allowed, since then we stayed at BCV one night to use the pool), but I much prefer being able to relax at the pool and I just can't do that at SAB because of the layout.