A Coke is a Pepsi is an RC Cola

Via JSTOR Daily:

It was reported this week that Coca-Cola is rolling out a new unified design across its different brands (Classic, Diet, Zero and Life). The idea is to have essentially the same design across the entire range, with the different cans varying only in colour. Spain is going a step further: all four varieties will use the classic red can, with only the colour under the swoosh varying. Throw in the three Pepsi brands (Pepsi, Diet and Max), and the cola drinker now has no less than seven different options; many more if you include the smaller brands and supermarket generics. But can anyone taste the difference between these brands anyway?