They both taste like toilet water, I used to drink Coke then Pepsi Max then Pepsi then Diet Coke and it eventually dawned on me that it all tastes horrible.
"If you put a bowl of pepsi and a bowl of water in front a puppy, even with all the marketing in the world in front of him saying shit like "pepsi puppies get more puppy pussy", the puppy will choose the water everytime...because it has an instict to survive that humans seem to have lost".