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