The Pepsi/Coke Challenge

Telling the difference in taste between Pepsi and Coke has never been a challenge to me. My family is largely Pepsi dominated, so that taste is very easy for me to detect. I can be handed some kind of Pepsi, and probably identify it as regular, diet, one, or cherry brand based on its taste alone. I know Pepsi well. By default, that means I can always tell the difference between Pepsi and Coke.

This however is not my challenge.

Here is the deal.... I like Pepsi better than Coke when it comes to drinking out of a can, but like Coke better when it comes out of the fountain.

Therein lies the challenge. Can you tell the difference between canned and fountain drinks, simply from their taste? Do these tastes change your priorities in drink ordering? What about a fountain Cherry drink vs. a bar mixed Cherry drink?