I've slept on the BWV and the VWL one. Seems the same to me. Have not stayed at OKW. Also BCV's are the same. Boy I don't sleep in the king bed much. Can't wait for the kids to grow up.....LOL.
We were just there @BCV and still had the older pull out model--very uncomfortable. I called the front desk and the maintenance staff brought up a new mattress for us, and it really helped.