I have really sensitive hearing and I honestly had trouble hearing any difference between my original copy of Zooropa and the one included in the box set. I can tell the subtle difference with AB but Zooropa sounds the same, with maybe a HINT of cleanup, though that might just be wishful thinking on my part. In the end I can hear the cleanup in AB: I can't with Zooropa and it's the U2 album that, in my opinion, needs it the most.