Food is better at 1900 PF and the Mad Hatter is great. Entertainment and the Fab Five are at CM. So decide which type of breakfast this is. Meaning I want good food and not Mickey and the gang. Or I want average food and Mickey. Easy Peasy decision.
I haven't been to Chef Mickey's, but if I was given the choice, I would still choose 1900 Park Fair because they have characters you might not see anywhere else.