Long Black and Cafe Au Lait are produced all around the globe. And they change according to region in where they are cultivated. So, the question arises what is Long Black and Cafe Au Lait's differentiating factor?In following section we will take a close look at what is Long Black and Cafe Au Lait color, serving style, types and much more. First thing to know is what are the different types of Long Black and Cafe Au Lait. Well, Long Black types include Espresso, Ristretto while types of Cafe Au Lait are Espresso.