I own at VWL, I love OKW too. I have been to both places.
I was really impressed with the latest
DVC offer to stay in a one bedroom condo at OKW for 199 a night plus taxes, as long as you see a tour on your trip. That price is INCREDIBLE, so as the other poster said if you are going in September or October, I would save all the money you can and go with OKW, and take some of that savings and rent the car.
The best part of OKW with a rental car is the fact you can drive to the front of your CONDO, get out of the car, and you will be walking inside your unit within 60 seconds. It is the fastest way to get to the couch ! And there are two couches, not just one in these oversized units.
With a rental car you can drive very close by and go to much cheaper eats than at Disney properties.
VWL has long corridors to walk through to get to your room, I love VWL, but if I had the chance to save a lot of money, I would not hesitate to go to OKW, and I would not feel deprived at all. But it is such a great location to have a rental car, that is totally accessible without any amount of walking.
The biggest problem about OKW is that when you leave, you really don't want to, and you wished you could live there.