It all seems to be a combination of Soy, Corn, Wheat, Beef, Chicken, Pork and Potatoes with just a difference in the sauces or spices.
Example: there are three chicken places in the mall where I work. 2 of the three serve THE SAME CHICKEN, probably bought AT THE SAME PLACE (I know this cuz *we* by our TP and frozen veg there ourselves). The sauce is also found at the same place. In the cooler. Seriously. I know right where it is
The names are different, but they both serve a sweet chicken (corn) over rice, a savory chicken over noodles, and different variations on the same theme.