There are at least three different types of sleeper sofas.
1- the old one with the bar underneath (realitively rare but still found)
2- the three part foam pad on a flat base (what you find at most
DVC resorts)
3 - the type that flip from the back and the cushions stay attached to help support the bed (found at BCV and BWV)
I rank them in this order of comfort - 3, 1, 2.
Studios have double sized sleeper sofas except at the new GFV. That studio sleeper sofa is suppposed to be queen sized. OKW has no sleeper sofa in the studio; it has two queen beds.
Beds in the studios are all queen sized.