It really depends on how many people are going, what room type you would get at OKW, and how much time you spend in the room.
If you are going for a studio at OKW, the room is slightly bigger than CB. You do have the added bonus of the kitchenette with microwave, fridge, and sink. The downside is the second bed is a pull out.
If you go for the larger villas at OKW, you have a massive bathroom with jacuzzi tub, full kitchen with all the plates, pots n pans etc, plus a washer and dryer. They also have a living room with a pull out bed and a king bed in the bedroom.
Personally, I love to stay at the Vacation Club resorts. The extra space is worth the extra money. Being able to dry wet bathing suits and clothes is also a big "plus."
You are looking at a substantial rate increase going to OKW, so you have to look at where the value is between each resort. Everyone has different needs. Some people would rather spend the money on location, or being on the monorail. For me, I like the added space and comfort of the villas over anything.