Loved CP for Breakfast. Loved CM for dinner. Second the remarks on the CP being a beautiful place, great food, and great character interaction. Breakfast lasagna was great, Pooh waffles, fruit, pancakes, made to order omelets. Plus you are right in the park ready to go.
Two items to think of - do your kids like the characters, and would they prefer having ice cream for breakfast. Some kids like the sundae bar at CM - ice cream covered waffle is great - and some would rather see Mickey, Goofy and Donald.
Just my two cents - I would pick CP