Wolfgang Puck Express is at Downtown Disney Marketplace and that is a CS. It serves pizzas, pasta, rotisserie chicken etc, very good value for a money or CS credit.
Wolfgang Puck Cafe TS is in DTD West Side. The upstairs bit is not on the dining plan at all, its a different TS. The downstairs bit is TS and does lovely food. We ate there once for lunch and once for dinner.
Is the upstairs Wolfgang Puck Cafe in the West Side no longer a separate restaurant? It used to be 'The Dining Room'. Allearsnet still have their menu up here: http://www.allearsnet.com/menu/menus.htm#pi