We are just back from BCV, VB, and OKW.
I love both BCV and OKW for different reasons.
But interestingly we both missed SAB everyday we were at VB and OKW.
When we were at BCV, everyday we spent 3 or 4 hours at the SAB with our pool noodles going around the deep lazy river area. I was never as happy on my trip, as when I was in SAB with my pool noodle.
OKW is nice for the ability to drive up to your condo unit, and taking the boat to DTD. Olivia's Restaurant is nice too. OKW is totally dependent on Disney buses or a car to go anywhere.
BCV is nice if you really want to hit EPCOT multiple times and walk back quickly from the International Gate, and is convenient to get to HS by Boat too.
Both are good choices.
I would pick BCV for myself, and BCV is the harder choice to get. OKW is easier to get and less points and roomier.
Try OKW and enjoy the boat ride to DTD, Olivia's restaurant, ask for a newly renovated unit, and enjoy the private beautiful feel of the resort. You need to try this place at least once. Most buildings here do not have an elevator so ask for a first or second floor if climbing stairs is an issue. I enjoy the pond/golf views near the Hospitality House. If your doing a studio here, you can swim while doing your laundry in the nearby laundry facility. Of course the Villas have your own private laundry inside the units. Again this is a great place to be with a rental car, it is so easy to get in and out of.
Points wise this is really
DVC's best deal, quality, and value for the points on property.
If I could live at a Disney DVC full time, I would live at an OKW Villa without hesitation.
If I could just visit a Disney DVC once a year, I would want to stay at BCV for the SAB and nearby park walking/boat access.
Good choices either way.
Have fun !