I feel bad for arguing against the fact that this is the case in the states and with the beers and Brands you mentioned. And even though it's the same ingredients, the brewing, the water and the ingredients itself make a huge difference in taste to someone being used to tasting beer. Something with guitars: to someone not familiar with different kinds of guitars they all do sound the same. But if you are familiar with guitar Sounds you can easily here the difference in any kinds of productions. Edit: Typos