All other WDW DVC Resort studios have one queen and a double pullout sofa.
OKW is the only DVC resort that has two queens in all of the studios.
Some of the Inn rooms at VB have one king, and the rest have two queens. Some Inn rooms even have a double sleep sofa in addition to the king or two queens. However, the VB studios all have one queen and a double pullout.
I do not know the studio configurations for HHI or VGC.