Everyone I know, including me, thinks Coke Zero tasted better than Diet Zero. This include people who normally drink regular Coke. I think I read that Diet Coke is the diet version of the New Coke, and Coke Zero is the diet version of the Classic Coke. In fact I am drinking a Coke Zero right now as I am typing this. After drinking Coke Zero for years, when I try a regular Coke, I feel like it is way too sweet. I just wish more food places would carry Coke Zero instead of just Diet Coke.