Just some things to keep in mind...
BWV has fewer units for rent than OKW. I personally have not had difficulty renting at OKW at the 11 or 7 month window. I've also had success at BWV at the 7 month window.
BWV just sold out a few months ago, it has been pointed out on these boards a couple of times that the difficulty reserving within the 11-7 month window this year may be due to the high sales last year that took advangtage of the MB program, which requires selling your points back to
DVC. We'll have to see if this theory holds ture once a year has passed.
We own at both resorts. Love them both for different reasons.
We find BWV has more of a hotel feel, and we enjoy it for short trips.
OKW has more of a "home" feel, very laid back, VERY spacious. (We find the units at OKW MUCH larger than BWV units--can't compare studios..we've only stayed in 1 and 2 bedroom units at both resorts)
We love BWV for the location. Great access to MGM and Epcot. Also enjoy the dining options, not only on the BW, but the surrounding hotels and EPCOT are all within easy walking distance.
We love OKW for the laid back atmosphere. It is so relaxing and a great way to wind down, kick back and just enjoy! When you're at OKW the parks are a million miles!
Never noticed any noise problems when we stayed at the BWV's. Although we don't have kids, we certainly saw lots of families having a great time at the luna pool and along the boardwalk. I think both resorts are very kid friendly (after all, we are at WDW!) but I think BWV has more activities that appeal to a wide variety of age groups.
Good luck with your decision!
Have a wonderful day!