I can't comment on SSR vs OKW, cause I've never stayed at SSR. Most people that have say that they both have the same kind of feel to them, cause they're more of a condo-style resort. But I have stayed at BCV and OKW, and while they are different they are both wonderful resorts. I like to stay at both.
If you've never stayed at OKW or SSR, I don't think you could go wrong with either one. They're definitely more relaxed, low key and laid-back than BCV/BWV, but it's a nice variety.