answer:I love Coke Zero. While it is also made with aspartame, like Diet Coke (so much for comparing ingredients) it doesn’t have the horrible aspartame aftertaste (that feeling you’re secreting fake sugar in your saliva) that Diet Coke does. However, Diet Coke has been around for a gagillion years, and has a lot of devoted followers who would revolt if their carbonated zero-calorie beverage of choice were to disappear. Coca-Cola learned its lesson with New Coke – don’t fuck with people’s soda. Give ‘em new stuff, but keep the tried and true classics around.