I'm fairly new to podfic, so grano salis, but so far I've never re-listened, even to a podfic I've adored, because there's just so much out there!

And so far, I haven't encountered a new and different recording of a fic I've listened by another reader, but if it was a fic I loved, and if I had any quibbles at all with the first, I'd definitely give the second a listen.