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