Chicago Style Pizza = thin crust. I grew up on Rosangela's, but then discovered Vito & Nick's later in life. Rosangela's "travels" better (takeout), but V&N is hands-down the best. They'll also half-bake it for you to take home and finish in your oven.
Chicago Style Deep Dish = made for tourists and high school kids who learned how to ride the L or Metra on their own for the first time to go out to eat downtown.
Detroit Style = also very good. If ever in Detroit, do Buddy's for the "original" experience.
If you're looking for Neapolitan pizza, go to Pizzaplex in Detroit's Mexicantown neighborhood.