Of course not. I have three McDonalds I can choose between going to work. All are different. The one on the freeway is higher. The one buried in a suburb is cheaper. Even the senior coffee is different.
Yes- all menu items cost the same at every outlet, regardless of rent, variable costs and the franchisee. There is no difference between any menu anywhere that takes regional items into account and there are never any test products being offered. If you are serious about your question you should not even be investing