There are so many factors that could influence this choice, but I'll put in my 2cents worth ...
I would think OKW, just because of the layout and size of the villas. There seems to be much more room around the furniture and the kitchen is open on both ends for a "flow through". Also, the table is free standing with 4 chairs so, I would think, much easier to access. Please note that this is the case for the 1BR and 2 BR, I have never stayed in a studio or Grand Villa at OKW.
This being said, all the resorts have HC accesible rooms so you should be fine wherever you choose to stay.