My advice is to buy where you really want to stay the most. You don't want to be sitting looking out across Crescent lake wishing you would have invested in the other resort, or staying in the other resort. Pick the one you really like and invest. Here's some biased thoughts regarding BCV vs. BWV -
I like the BCV room layout better. Table seats 8 whereas BWV, WLV does not. Bathroom layout nice, Desk in bedroom in BCV.
BCV is newer.
Seemed slower and a little more quiet and relaxed than BC, YC and BWV, yet still close to activities.
Distance to the elevator is better.
Nice Quiet pool
Lots of nice internal spaces for when it's raining, drawing room, breezeway, solarium, BC lobby.
Sandcastle club availability
Outstanding location, boat to MGM, walk to Epcot, Baordwalk area activities closeby, swan and Dolphin restaraunts.
Love the Beach Theme
Great at access to Beach Club amenities, and restaraunts, Jellyrolls, stores, Beaches and Cream, Arcade, etc.
Prefer the sand beach along crescent lake instead of the boardswalk
SAB is nice
Nice Beach Club Workout facility.
Nice access to the parking lot
Bus service fine.
Hotel services available like in-room dining, valet services, front staff.
Nice entrance to the resort walking in BC entrance with large fresh flower arrangements, sometimes music in lobby (saw harpist) front door greetings.
Marina activites, can take boats to see illuminations.
BCVs has access to a marina along with the YC and BC. WLV and OKW also has a marina, BWV does not. Bike and boat plan is an option at the marinas.
No community Hall and Community Hall activities like BWV, Vero, others.
Uses all preferred view point structure, no advantage of standards view lower point structure like at BWV or lower points requirements like at OWK to stretch point value
Rooms smaller than OKW, less storage space - OKW, Vero and HH rooms are larger.
No three bedroom grand villas available (usually requires 11 month window at other resorts)
No outstanding crecent lake views like BWV
Villas in back are too close to roadway, some noise.
Hope these help. Good luck with your decision.