The definition of candied yams and sweet potato casserole is often quite subjective, depending on what you grew up with! In general, candied sweet potatoes are cubed yams or sweet potatoes roasted with syrup or another sweetener, butter, and warm spices until the potatoes are glazed. Sweet potato casserole usually consists of cooked potatoes that are sliced or pureed, mixed with butter, spices, and sweetener, then baked with some sort of topping. The topping might be brown sugar and butter, or it might contain flour and be more like a crumble or streusel topping. Both are delicious!