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