You will get alot of people partial to BW, and alot of people partial to BC - it's really personal preference. But we too own at BW...because it is our favorite
DVC resort. Many, many people really love BC. Though I've never stayed at the BC villas, I think the resort is beautiful. I've taken my kids over to the pool before there were pool hopping restrictions with SAB. It's nice, but very big and winding, hard to keep track of the kids unless your in the water with them. Most people rate it the best pool on property.
IOHO....
However, we favor BW. I prefer "sharing" the lobby area with the hotel......we prefer the villas with the "hotel" feel. It is not a separate outside building and we really like that. Lots to do at BW all the time. There's the surrey bikes, the community hall, a great slide on the pool, a nice quiet pool, the shops, the ice cream parlor, and restaurants (Big River Grille has outside seating). Jellyrolls for the adults, which is a blast, and the arcade at ESPN. There's nightly strolling entertainment on the boardwalk and it's right between Epcot & MGM. It also has tennis courts and bicycle rentals (I think all the DVC resorts do though).
BC, on the other hand, has Beaches and Cream - yum, and a white sand beach area with beach lounges, and of course SAB.
It really depends on which you prefer the most. Have you visited either one of them? Perhaps that would help. BW has walk through models of the villas so you could see the rooms in the BW theme decor, stroll the BW and check out what's available there, and maybe go over to Y&BC area and have lunch in B&C? Just an idea.
Anyway, either one is great and you won't regret becoming a DVC member. Good luck with your decision.