Cortado and Fermented Tea are produced all around the globe. And they change according to region in where they are cultivated. So, the question arises what is Cortado and Fermented Tea's differentiating factor?In following section we will take a close look at what is Cortado and Fermented Tea color, serving style, types and much more. First thing to know is what are the different types of Cortado and Fermented Tea. Well, Cortado types include Cortado Bombon (espresso with condensed milk), Leche Y Leche (with condensed milk and cream on top) while types of Fermented Tea are Oolong, Black, Pu-erh.