A ranking of popular sandwich chains has been released, with various outlets reporting on the results for specific types of sandwiches, including italian subs, tuna subs, spicy chicken sandwiches, and fish sandwiches. The rankings appear to vary depending on the type of sandwich and the criteria used, with different chains being named as top choices. The rankings seem to be based on customer satisfaction and taste tests, but the overall number one chain is not consistently reported across outlets.