DH and I had a dedicated studio at VWL in May. The room had no connecting door to another room, had two closets, and seemed larger. It was really nice. #1514 first floor.
I think the term dedicated is used when there are no connecting doors to other rooms. A two-bedroom can be a one-bedroom and a studio connected by a doorway. A dedicated two-bedroom had only one entrance to the suite and sometimes the bed configuration in the 2nd bedroom is different from the studio (queen bed and pull-out sofa, except at OKW where it is two queens).
I'm sure if I'm confused, someone will give a better description.
Hope this helps.