just personal observations...
I didn't know what Detroit pizza is. Being from Ohio originally, I have been eating "Detroit" pizza or some version of it, frequently and never heard it called "Detroit pizza" before. Maybe its an Ohio State/Michigan thing that the name was never uttered publicly.
Seeing pics from other threads reminds me of more than a few pizzas I ate back home. some do sauce under cheese with pepperoni on top some do pepperoni under cheese sauce on top. but they all share that greasy dense bready crust with the baked on crunchy cheese ring around the edge.
Little Caesar Pan! Pan! comes to mind immediately when I saw it. LC isn't known for good pizza but I really developed a love affair with the square ones for quite some time. It's the greasy dense crust combined with gooey cheese and sauce until you get to the edge with that... salty crunchy baked on cheese. it's about mouth feel and textures as much as flavor. Flavor varies from shop to shop but the textures and mouth feel are pretty much universal.
There are a few other places that make this style that I enjoyed a great deal but I cannot recall them as the LC was cheap and plentiful so it was most common for me at the time. one place I went to a lot used to throw a massive amount of Jalapenos on top of the sauce for me. I asked "can you throw some Jalapenos on that for me?" and from then on that was my pie.
I commented elsewhere about "Tommys pizza" being a taste of home... this style pizza reminds me of home as well. Its like a thick and greasy pizza flavored cheese blanket. I love it.