Liqueur Coffee 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 Liqueur Coffee and Doppio's differentiating factor?In following section we will take a close look at what is Liqueur Coffee and Doppio color, serving style, types and much more. First thing to know is what are the different types of Liqueur Coffee and Doppio. Well, Liqueur Coffee types include Whisky Coffee, Gaelic Coffee, Irish Cream Coffee, Sultan Special Coffee, French Coffee, Brandy Coffee, German Coffee, Italian Classico, Caffe Corretto, English Coffee, Russian Coffee, American Coffee while types of Doppio are Espresso.