I think most of a choice between BCV and BWV is a matter of personal preference...your "feelings" about the atmosphere of each resort. There are a couple of more practical considerations, tho:
1. You can pool hop to BWV's pool, but not to BCV's...if you are a fan of Stormalong Bay, that may be a reason to choose BCV over BWV
2. Epcot's International Gateway is but a five-minute walk from BCV...of course, it's only a 10-12 minute walk from BWV (and it's a longer walk to the Studios from BCV)
3. BCV is much smaller than BWV and it's also very popular. The 11-month home resort window is extra-valuable at BCV. BWV's standard view rooms (a bargain w/respect to points "costs") are also limited in number (as are Boardwalk view villas)...if you really want SV or BW, then the BWV 11-month home resort advantage is particularly valuable...
We own at BCV and frequently stay at BWV (we also own at SSR and we stay at just about every
DVC resort...the only one we've missed so far (at WDW) is Wilderness Lodge)...there are times and vacations where we can and do make use of our home resort advantage...but we also do a lot of inside-7 months (and some positively last-minute--i.e., 3 weeks out--) trips, too...there are certainly times we can't get in (every resort on property as far as that goes), but the home resort advantage at BCV is particularly valuable to us for our regular T-giving trips...
Good luck w/your choice--