Hmmm. The analogy falls down (as usual) if you try to push it too far - both ales are models of probity and the best way to tell which is which is to taste them (and, Yes, I could tell which was which from the taste! - not from the colour, which is very similar, but possibly from the head. [the froth on top])

Why don't you pop across, and we can put it to the test?