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