Frequently Asked Questions about the Difference Between Diet Coke and Coke Zero Q: What is the difference between Diet Coke and Coke Zero? Diet Coke and Coke Zero are both zero-calorie, sugar-free soft drinks produced by The Coca-Cola Company. However, they have slight differences in taste and ingredients. Diet Coke has its unique flavor, while Coke Zero is formulated to taste more like regular Coca-Cola. Additionally, Diet Coke contains artificial sweeteners like aspartame and acesulfame potassium, while Coke Zero uses a blend of aspartame and acesulfame potassium along with a different type of sweetener called “acesulfame potassium.” To learn more…