Is there a difference in tone between the 50's style vintage pickups and the 60's style vintage pickups?
In my limited experience and understanding, in the 60's, Fender slightly goosed the output on P-bass pickups, so they ended up a tiny bit louder, but also more smooth across the spectrum: slightly richer mids, and a little less full in the bass and treble. But then, they also weren't wound to very tight tolerances, so there was a lot of variability from pickup to pickup. But both are definitely more P-bass than anything else.