Skipper Canteen. No contest. It's not even close.
You asked for "Help". So here's my opinion:
Skipper offers good food and adventurous flavors. Skipper let's you try something different, especially on vacation. Skipper is a unique atmosphere and warm, casual and relaxing environment.
Chef Mickey is an all you can eat buffet of cafeteria quality with noisy, unruly kids, food on the floor, characters interrupting the meal in a cold, institutional atmosphere.
This seems like a choice you should easily be able to make based on the menu alone. Will your kids be adventurous and try some of the adult entrees? Have you looked at the menu? Do you see food you and your spouse would enjoy? This isn't apples and oranges. This is chicken nuggets vs. char sui pork. Best of luck.