I lived most of my life 11 miles outside of Detroit, and later a buddy worked and than owned a Pizza place in Detroit, never heard of a Detroit pizza till about a year ago!
You had an inadvertent pun there when you said "buddy" because that's what a Detroit Pizza is, an 8-square from Buddy's.
Here's a story about food being called different things in different places. Back in the 80s, my BIL and myself, both military history buffs, went on a long weekend trip to New England. Along the way, we stopped at Fort Ticonderoga. We were looking at the menu in the restaurant there and say something called a "Michigan hot dog", which we had never heard of. We asked our waiter and him, having worked in Michigan, explained that it was what we referred to as a Coney Island. I found it funny that in Michigan it's named after a place in New York and in New York, it's named after Michigan.
