Indeed. I briefly compared with the version I have here but without even listening, the waveforms looked almost like two different pieces of music - a radical difference in level compression between the two.1. Who knows what master recording each copy came from? Your .mp3 could have come from a remastered version of that Beatles album or some other discrepancy like that. There are MASSIVE differences between different versions of that album. Some of them aren't even in stereo!
That's missing the point. If we're assuming that the BB seriously degrades the sound (which I think it doesn't actually) then testing the supplied files which have been once through the BB already (in the case of two of them) kind of defeats the purpose.I just listened to your sample files through my BB setup