Although some items may be the same, there are differences between the value food court menus. For example: the All Stars have a taco salad, Pop does not. The All Stars offer a mushroom swiss burger, POP doesn't but POP offers a cheesesteak wrap that the stars do not.
All of the resorts have specialties that are only available at that resort- we normally stay at POP but do go to the other values as well as moderate and deluxe food courts to have their specialty items not available at POP.