Finally saw these at TRU today, so I bought one. I opened it up and put it together. The figures appear to be unique to this set as far as I know. Only 6 basic points of articulation though - arms, legs, head and waist. I think Obi-Wan's face is a better likeness than the two carded versions. Vader has his mouth open and if you raise his arms up, it looks like he is doing some sort of monster impression.
The playset itself doesn't impress me too much. It has a place to attach the Deluxe Vader on table, so perhaps I'll put it there when I open it. I don't have the Battle Arenas, but they can attach to it as well. For me, it will mainly be a place to display some figures in a movie setting.