It's the diet version of Coke Classic. I didn't know this until recently, but the regular Diet Coke is a completely different drink than regular Coke. Now they've made a diet version of regular Coke that is absolutely great! I can't taste the diet in it at all ... you would swear it wasn't even a diet drink.
OH! Well I didn't know that either. I was wondering if they were just changing the name of their diet coke or something. I will have to try it. But I really like the Diet Coke with Splenda, I think it tastes a lot like regular coke and it doesn't have any aspartame in it. But I will have to try a Coke Zero when I go to the grocery today. But they should really explain these things to us.