This is the list of offerings posted on wdwinfo.com
Supercalifragilistic Breakfast Adult - Breads and Pastries: Assorted sliced breads, croissants, bagels, pecan sticky buns, cheese danish, flaxseed-zucchini muffins and blueberry muffins, served with cream cheese, and grape jelly. Cold Buffet: Flavored yogurts, fresh fruit, chilled strawberry soup, assortment of cereals, House made granola, and Rice Krispie treats. Edy's Soft Served Ice Cream also available with an array of toppings. Hot Buffet: Chef's preparation of custom eggs and build your own omelet. Bacon, Sausage links, carved ham, scrambled eggs, bread pudding with vanilla sauce, roasted potatoes, Mickey shaped waffles, Grits and Oatmeal. Menu Subject to Change without notice. 18% gratuity added to parties of 8 or more. Full service bar available. Prices are 15.00 to 35.99 *
This is the one for Cape May:
Goofy's Beach Club Adult Character Breakfast Buffet 7:30am-11:00am - Fresh cantaloupe, honeydew melon, watermelon, and fresh berries, mixed fruit and yogurt selections. Scrambled eggs, omelets and eggs to order, biscuits and gravy, French toast, and Mickey waffles, bacon and sausage, seasoned potatoes, assorted hot & cold cereals, bread pudding with vanilla sauce, muffins, danish, and donuts. Bagels and breads toasted to order, coffee, tea and juice selections. Prices vary 15.00-35.99
So they're pretty similar food-wise. I've never eaten at either for breakfast, so I don't know if the quality varies. Generally speaking, the food hasn't been fantastic at any of the character buffets I've done, but it wasn't inedible either.