Re: Jazz Neck vs. Jazz Bridge
In bright or thin-bodied guitars, a little hotter bridge PAF-type PU can work work well in the neck. Usually in dark or thick-bodies (like an LP) a neck PU at 7,000 to 8,000 ohms is best to avoid a blurred, muddy sound. Everything else being equal, more ohms means more mids & less treble and clarity. But some PU's are wound with thinner wire or thin coils to change the EQ.
No hard and fast rules. Depends on what you want tone-wise. Some players use real hot bridge PU's in the neck, but that's usually for more extreme kinds of metal. Most neck PU's are wound less for better definition, and most bridge PU's are wound hotter for more output, more mids, and less treble. Remember you can use magnets to change EQ & output too.