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