Corby - // In the video in the link, the second pour sounded like it was more bubbly or frothy than the first and it was easy for me to spot that difference. //
It leaps out at me instantly.
But other things do as well. If they re-record a tv theme tune, they do it with Corrie periodically, i can instantly hear the difference. Same with re-records of pop songs for adverts, where the sound difference is really minimal, I still hear it instantly.
I drive my wife crazy pointing these things out, she can never understand why I hear these differences.
Maybe that's why I don't like 'trbute' bands - because a lot of people are happy to hear the songs played on stage, but for me, it is so obviously and jarringly different, that I can't listen and enjoy it.