Compare and Contrast

I'm going to be writing about what the actual differences between Pepsi and Coca Cola are, the companies and the products. I chose this because I have many friends how are completely insane about which drink is better and would rather die than drink the other, and I know other people who get angry and insist that the drinks are exactly the same and its all marketing blah blah blah. I've personally been a Coke fan all my life, though I will drink Pepsi if that is all that is available. Recently I've discovered that I'm starting to like the taste of Pepsi better, and I really wanted to know what actually made the two different. Though I know that this topic seems to show up all over the place, I have an actual reason for choosing it (not that it's easy) and an interest in it.