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