Honestly? No comparison. Bruce could not and cannot hit the notes Rob did. Don't get me wrong, this was a great rendition of "Children" and my own tag photo shows I am no hater of Maiden but Rob puts Bruce to shame.
Bruce strains to hit the lowest note Rob can hit. Let me see one vid of Bruce trying (key word there) to sing "Victim of Changes" then or (even worse) now and there is just no comparison.