I cant understand the point, ( sorry my english in advance ).
The lead vocal ( with so many takes ) you mean, other tonality?
To make chorals, this ppl recording so many different tracks in many different tonalities ( 8-10, etc diff. tonalities 3rds, 6ths, so on !)to make the chorals.
But , i think you want discover the Fat tecnic to the lead vocal Sound, is this?
Your tecnic copy and paste i think the betterform to Fat the sound...