Having never been to Detroit’s Greektown, I can’t fairly compare it to Chicago’s. I have been to Greek restaurants in several different parts of the country, and Chicago has the best that I have found. The places are frequented by most local Greeks, so while it may not be as good as Yia-Yia makes, it is authentic and very good.
One of the things I really like most about the Chicago dining scene, is the great diversity and quality of ethnic restaurants. I belonged to an ethnic dining club that met every month at a different ethnicity’s restaurant. With the popularity of the club (50-60 of us per event), the menu was set up in advance by the restaurant owner by his suggestions and served family style. We wound up usually with 3-4 different appetizers, 3-4 different entrees, a soup, and dessert, for about $20-25 which included tax and tip. The group ran for over 4 years without repeating a cuisine.