While I can't speak knowledgeably about OKW (only heard how spacious it is), I can say that if you like peace and relaxation...VWL is awesome! It is a beautiful, quiet resort that makes you feel like you are a million miles from anywhere, yet in moments you can be on the boat to the MK, buses to the other parks.
The accomodations themselves are nice. We enjoy the studios there very much! The quiet pool is great! The on-site restaurants are good (whispering canyon has good food and fun) and the water "toys" are great fun to ride around on Bay Lake. The best part about VWL rooms IMHO is how QUIET they are. Been there in a studio three different times now and have never heard anyone next to, or above us. Can't say that about many hotels or resorts!
Enjoy your time there! Wish it was me ;-)
Laura