some consumers generally not consider all market products as same like in question some consumers consider the variation in taste of coffee available in market . so this type of phenomena is know as product differentiation in market. In product differentiation consumer consider little variation in similar product regarding taste, color, smell, size and so on. mainly this process related to economics and management in which you study about product differentiation. It really provide edge to different competitors work in market. To sum up, when consumer consider unique qualities of product while choosing and buying it is know as product differentiation.
