We just returned 23 hours ago (***sigh***), and our choice is definitely BWV.
We have stayed at all
DVC villas and this time we tried the new BCV with a 2-BR. The studio portion was essentially identical to the other resorts (we couldn't see any difference) but the 1-BR was decidedly smaller. No huge, walk-in closet; less under-the-sink cabinet space in the jacuzzi bathroom; less closet space then the 1-BR; we could hear the bathroom in the villa above us (running water, flushing, and the jacuzzi at 7am). The master bedroom closet did not have a light and was hard to see.
While it has a nice entry/foyer, it was wasted space for us. I would rather have extra closet space. It also had a desk in the master bedroom. My cousins are also DVC members and they visited us during our Christmas stay. Their opinion is the same.
The BWV's are quieter, larger, and only an extra 5-8 minutes away from Epcot. With the pool-hopping privilege, we have used Storm-a-long Bay often.
We actually enjoyed our stay at the BCV. It is a great place! I also liked the oval dining table with the bench seat. It just didn't suit us like the other DVC resorts.
This is just my personal opinion. We are a family of 5 (including a 4-month infant). If we had only had a 1-BR, we would not have had enough storage space and the playpen/bed would have had to be in the foyer or crowded into the master bedroom (the desk took up the free space). We can use a 1-BR at any other DVC property and have much more room. The walk-in closet can even be a nursery, if necessary. (Sometime you just have to isolate a baby from all noise and stimulation.)
PM or email me if you have any questions.