BWV has a serious 11-month issue. Resort studios (formerly named standard view studios) fill year round for any given arrival date at 11-months out within moments after 8 a.m. eastern. You may be able to pick up days after 11-months out as walkers pass by or reservations are canceled, but you should assume that to actually get a multi-day reservation, you will need to spend a lot of your time trying to get it, and even then there is often failure. The same 11-month issue applies to the boardwalk view studios throughout the high demand "Fall" season that runs from late Sep to marathon weekend in Jan. and that also sometimes happens at random times the rest of the year. Even the pool/garden view studios may have the issue during extremely high demand times in that Fall season -- such as first 2 weeks of Dec, Christmas week, race weekends, and time around Thanksgiving.
CCV studios also have an 11-month issue, although it is not as bad as BWV's. They can disappear right at 11-months out during that Fall season, particularly during those extremely high demand times. It can also have an 11-month issue at various times the rest of the year, but then it is often a one-or-the-other problem --the tub studios will be filled while the shower-only studios remain open for some time past 11-months out, or vice versa.
CCV has the advantage of a much later end date -- 2068 to BWV's 2042. The BWV rooms are larger -- e.g., studios at 359 sq ft compared to 338 at CCV. BWV provides the boardwalk and its restaurants and night life, and fairly quick access to the restaurants at Epcot, YC, BC, and S/D. CCV/WL has one of the most impressive lobby areas at WDW, including when decorated at Christmas time. BWV's lobby area is just OK and much smaller than CCV/WL's.BWV provides walking or boat access to both Epcot and Studios, while CCV provides no walk-to-a-park access but easy boat access to MK.