Vienna Coffee 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 Vienna Coffee and Bulletproof Coffee's differentiating factor?In following section we will take a close look at what is Vienna Coffee and Bulletproof Coffee color, serving style, types and much more. First thing to know is what are the different types of Vienna Coffee and Bulletproof Coffee. Well, Vienna Coffee types include Kleiner Brauner, Kleiner Schwarzer, Großer Schwarzer, Kapuziner while types of Bulletproof Coffee are Espresso.