Aug 1, 2017 · If you look at the ingredients between the three, they aren’t actually all that different. And, in fact, Coke Zero and Coke Zero Sugar have exactly the same ingredient list. Here’s the list of ingredients in Diet Coke: Carbonated water, caramel color, aspartame, phosphoric acid, potassium benzoate, natural flavors, citric acid, caffeine. Regular Coke 9.7 mg/100ml. Diet Coke 12.8 mg/100ml. Coke Zero 9.6mg/100ml. As you can see, the amount of caffeine in Coke Zero is almost identical to that of Regular while the levels are higher in Diet Coke. The fact that both Coke Zero and regular coke have virtually the same amount of caffeine must account for the almost indistinguishable taste. .

coca cola normal vs zero