IMHO, it really depends on the dates you want to stay. I will assume you do not have a strong preference for either resort interms of the theming/amenities.
If getting a standard view or a Boardwalk view at the BWV is important to you, you will need the 11 month window pretty much all the time.
December is difficult to reserve at 7 months at both - but BWV has more rooms.
Food & Wine Festival dates at 7 months are more difficult at BWV than VWL.
IMHO, the rest of the time is pretty much equal - you can probably get your 1 bedroom at 7 months at either resort most of the time, especially if you are willing to use the waitlist. BWV will always be a little easier (preferred views), because there are more rooms at the BWV than at the VWL.
My advice is to base your decision on whether or not you need/want a standard view or Boardwalk view when you stay at the BWV. If yes, buy BWV. If that doesn't matter, get VWL.
Best wishes -