Coke vs Pepsi: Why Americans are so fiercely loyal to their soda of choice

The rivalry between Coca-Cola and Pepsi has been bubbling for generations, and a person's preference for one soda over the other likely involves a combination of factors.

The differences in the two sodas' ingredients could help reveal why some consumers prefer Coke to Pepsi, or vice versa, according to The Takeout. The outlet reported that Coca-Cola and Pepsi differ somewhat in their formulations. Pepsi contains citric acid, which Coca-Cola does not, and slightly more sugar per 12-ounce serving — about 41 grams to Coke's 39.