1. Bread is different: the Imperial Castle uses oatmeal bread, while the Cheese Beef Castle uses ordinary bread.

2. Different ingredients: there are two layers of beef patties, lettuce, tomatoes, pickles, onions, sesame bread, mayonnaise and cheese in the yellow bag. Cheeseburger has a layer of beef patties, lettuce, tomatoes, pickles, onions, sesame bread, cheese and cheese sauce.