Alfredo sauce is similar to Béchamel in some ways. Both are dairy based white sauces that are rich, creamy, and often used in pasta dishes. However, Béchamel sauce is made with milk or half & half where Alfredo often includes heavy cream. And, while parmesan Béchamel recipes like this one include some cheese, Alfredo sauce recipes generally include quite a bit more. Alfredo sauce also almost always includes garlic, an ingredient you're unlikely to find in Béchamel sauce.