When I was a contractor, helping to take care of Outdoor Food (aka ODF) at all 4 parks, I was surprised about how each of them ran very differently.
While I'm not sure if it has to do with competition, I saw some things that worked much better at some of the parks and wondered why they didn't communicate to enhance all of them. For example, at night time, some of the ice cream carts are in a very dark area and you can barely see inside to know which ice cream type you were pulling out. So at EPCOT, they have lights installed inside the umbrellas. The other parks didn't have this.
Anyway, I don't know if this helps or not, just an observation.