I just went through the same dilemma ... trying to weigh the pro's and con's of both resorts.
Since the rooms are pretty much identical, and both are located on the boardwalk, I focused in on the pool because that's what my kids would care about most when we want to unwind after touring the parks.
I discovered that the pool at the BW is over on the Villas side, so if you've got a room at the Inn, it will be a long trek over to the pool area. It's also much smaller, but shared by two hotels.
The "pool" (Stormalong Bay) at YC/BC is also shared by these two resorts but is considerably larger, more like a water-park, which will be a huge hit with the kids. There is a big waterslide but also a smaller one for younger kids.
If you can't get into BC, I would still try YC over BW.