An inch difference in PAP is a pretty significant difference in ball reaction. I'm surprised that your drillers are in disagreement, as a 4" PAP is pretty low by today's standards and it seems like you'd be able to tell that's the correct one (or not) just by looking at the release, ignoring the ball track.
Has either been confirmed? How are they measuring? Looking at the oil rings? Armadillo? Piece of tape?
SH