Earlier quoted context omitted.
Have you tried aspartame? I've found that Coke Zero tastes much closer to real sugar than Diet Coke.
Diet Coke uses aspartame also. I figured the difference between Coke Zero and Diet Coke was branding for people who don't want to drink something labeled as diet. EDIT: I drink both regularly (including today), and I personally do not perceive difference in taste. YMMV.
Diet Coke (last time I checked) just uses aspartame.