Express is basically take out (or take it outside and eat it at the tables). The pizza's take a few minutes to cook, but the sandwiches and such are ready to grab and go, not much wait.
Express has no atmosphere so to speak, and really isn't much more than a glorified fast food counter service (but the food is higher quality). I doubt they take PS, and I don't think you would need one.
Cafe is a restaurant. LOUD, with small tables and trendy looking wait staff. The menu is 10X or 20X that of the Express offerings. Lots of sushi.
Have tried both. Won't bother with Cafe again, but may try Express if in a big hurry.