I think Ross's are better than Miss Mamie's. Miss Mamie's has changed their cinnamon rolls recently. Ross's are huge, though - one is good for three or four people. Granite City is a chain but they have good cinnamon rolls too.
I like the new rolls at Miss Mamies and besides they are free with dinner or lunch(only one per person though) they are warm and part of the bread basket. The server said the only thing different is now they don't bake em in a muffin pan.