Sanaa serves lunch and dinner and is regular table service from menu. BOMA serves breakfast and dinner and is buffet. BOMA tends to be noisier because of it's location in the Lodge, whereas Sanaa tends to be a quieter experience. I happen to love both and will probably be going to both a lot in December since I am finally staying at AKL for a week. BOMA has the best breakfast in WDW in my opinion. As PP said, look at the menus. BOMA is buffet so would have more options and you can sample a lot of things, but the menu items at Sanaa are very good if you want to stick to one or two choices. Just my two cents; take them for what they're worth. Either way, you can't really go wrong. Have a great time.