apparently, the only difference between coke and pepsi is the fact that coke is made with white bleached sugar, and pepsi is made with brown sugar. Minor differences in the manufacturing processes mean difference in fizziness etc, but essentially the same ingredients other than sugar type.

but the main thing is the fact that pop/soda is so bad for you! stop drinking it! It might tase good, but its intended to! Your body hates it, the sugar content is so high and the preservatives are nothing short of poison. There is no goodness in it, and your addicted to it - face it - you are! You are paying into a global problem from obesity to corporate sponsorship - I just wish you all knew. And dont think diet coke is better, the artificial sugars in those make your body produce insulin when you dont need it. Not a good thing. Oh, and Im sure youd like to keep your teeth

If you want to take care of yourself, drink water - its the best thing for you. And your teeth.