The main difference between Amber Sauce and Sweet Chili Sauce as far as I know is in their flavors and uses. Amber sauce has a tangy, mildly salty flavor and is mainly used in fried foods such as chicken to reduce the greasiness. Sweet and spicy sauce, on the other hand, is mainly sweet with a certain spicy flavor and is versatile enough to be used in a variety of cuisines, such as chicken, duck, dumplings and so on.