Same size. All have balconies or patios (on the ground floor).
Generally people are of two opinions on requests. High floor far from the elevator offers the best chance at a good fireworks view. Low floor close to the elevator offers the best access to the pool, the buses. If you don't mind the stairs, high floor isn't bad at all. If you do mind the stairs, and don't like the long hallways, the glimpse of Illuminations over the top of the building may not be worth the walk.
I've only gotten one request in all my years of BWV ownership - on this last trip I had two rooms I requested be close to one another - and they were right next door. I also had on the reservation that it was my sister's cancer recovery trip - and I suspect that some additional effort was taken in room assignment. Otherwise, if I want easy access to Luna Park, we have a great view of Illuminations. If I want a high floor to see fireworks, we discover how nice it is to be able to walk right out to the buses......