Irish Breakfast Tea 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 Irish Breakfast Tea and Doppio's differentiating factor?In following section we will take a close look at what is Irish Breakfast Tea and Doppio color, serving style, types and much more. First thing to know is what are the different types of Irish Breakfast Tea and Doppio. Well, Irish Breakfast Tea types include Black while types of Doppio are Espresso.