I'm not sure about WL. However, all the value resort rooms are 260 sq ft. The moderates (except the Caribbean which is 340 sq ft) are 314.
I have a friend who used to work as a Housekeeper at Caribbean who worked at AKL when the CB was closed a couple of years ago; she said that the standard rooms at AKL were smaller than in CB. The WL rooms are the same size as AKL.
For a good price with the largest room go to Caribbean.