Comparing the Burger King Sausage, Egg & Cheese Croissan'wich Large Combo and McDonald's Happy Meal Hamburger with Apple Slices, both are popular breakfast options. The Burger King combo features a croissant sandwich with a sausage patty, egg, and cheese, accompanied by hash browns and a drink. On the other hand, McDonald's Happy Meal includes a hamburger, apple slices, and a drink, often targeted towards children. Nutritionally, the Burger King combo has more calories, fat, and sodium due to the sausage and cheese, while the McDonald's hamburger is leaner. The apple slices in the Happy Meal provide a healthier fruit option. The Burger King combo caters more to adults with a heartier breakfast, while the Happy Meal is a kid-friendly choice with a healthier side.