Nutritionally, there are no significant differences. Their ingredient and caffeine contents are also similar, so neither is healthier than the other. Remember that diet soda is not considered a healthy drink. The most important difference between Diet Coke and Coke Zero Sugar is flavor.
Coca-Cola Zero tastes the same as regular Coca-Cola, while diet Coca-Cola has its own distinctive flavor. Coca Zero looks and tastes like classic Coca-Cola, but Diet Coke has a lighter flavor than the original. For those looking to recreate the experience of drinking a classic Coca-Cola, Coke Zero is the way to go. If you want a slightly different mix of flavors, the lighter flavor of Diet Coke is refreshing and tasty.
Healthy people may experience mild gas or bloating after eating foods sweetened with sugar alcohols, but if you have a gastrointestinal condition, such as irritable bowel syndrome, or eat a large amount of something sweetened with sugar alcohols, you could experience more extreme symptoms. Zero-sugar or low-calorie alternatives are usually hundreds or thousands of times sweeter than regular sugar, but they don't raise blood sugar levels. A more immediate unpleasant effect of consuming sugar alcohols, a type of low-calorie sugar substitute, are gas, bloating, and diarrhea.
