Espresso Romano and Guillermo 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 Guillermo's differentiating factor?In following section we will take a close look at what is Espresso Romano and Guillermo color, serving style, types and much more. First thing to know is what are the different types of Espresso Romano and Guillermo. Well, Espresso Romano types include Espresso, Cappuccino, Macchiato, Mocha, Red Eye, Palazzo, Iced Coffee while types of Guillermo are Espresso.