Actually, if you are in a dedicated 2-BR at SSR, your second bedroom will have two queen beds. The lock-off 2-BR will have the queen bed and sofa sleeper. Ask for a dedicated 2-BR. We love both resorts and it is hard for us to decide as well. We really love the bigger room at OKW since the biggest space difference is in the living room and kitchen area. Plenty of room to spread out. SSR is newer though, and depending where you stay it is a short walk to DTD.
There are two other main differences between SSR and OKW. First is that at SSR, you will have an elevator in every building and at OKW, they are only in three or four (can't remember exact number). If you are on the second or third floor, you will be walking up steps. The other issue is at OKW, the 2 BR units in buildings 30 and below do not have a bathroom access from the living room. You need to use one of the bathrooms in a bedroom. Can be an issue if you have sleepers in the living room. SSR has access. These may or may not be issues for you.