Nope. Both 20 fret american std necks and bodies. I swapped the 08 precision neck with a 2011 precision in the past, and there were no issues. perfect fit. Had another 09 sunburst P, perfect fit. All 3 precisions had tight neck pockets, that there wasn't even a paper gap. When I bolt the precision neck on the jazz body, there's maybe a 1~2mm gap at the heel, because of the difference in contour.
I have a few genuine fender pickguards for the precision, and they all fit on the pbass perfectly without any gaps. Even the jazz pickguard has the same "pointy" contour like the J body neck pocket. When I compare the heel shape with USA std jazz body and jazz pickguard, there is a clear difference in shape between the p and j.
I'm going to take my precision and jazz pickguards to guitar center and check how they fit on 2013 AM stds. If they're all like that, I'll just keep a J neck on the jazz.