I think there was a study done after the whole Pepsi challenge thing that showed tasters preferred a single taste of Pepsi over Coke (possibly because its sweeter), but when it came time to drink a whole can, Coke was preferred (possibly because it's less sweet). Not sure it was a real test without some rum or whisky.
I don't really like either. Do they have Ginger Ale or Birch Beer? I like those.
