Both drinks have identical ingredients besides the sweetener! However, there are very slight differences between the two sodas. One difference is that Diet Coke, believe it or not, has slightly more calories than Coke Zero. Diet Coke has one calorie per 100 milliliters while Coke Zero has only .5 calories!
The only other difference is that Coke Zero is targeted specifically at men! Similar to Dr. Pepper 10’s model, Coke Zero is advertised as a “manly” diet drink to make diet sodas appear “masculine”.
Another interesting fact about Diet Coke? In many European and South American countries, there refer to Diet Coke as ‘Coca-Cola Light’.