Pole Piece location and the effect on tone? Or something else?

Ok TB I have two Modern Player Jazz Basses. The sunburst is the first production run.


MPSB.jpg


The white is the second production run.

MPwhite.jpg


These bass sound different from each other particularly in the mids and highs. Not dramatically different but enough that I prefer the sunburst tone to the white one.

The biggest different that I can think of that would effect the tone would be the difference in pick ups. The pole pieces on the sunburst are basically directly under the strings white the white bass the pole pieces are in between the strings

My question is do the location of pole pieces effect the tone of the bass or is it something else?
 
The ones on the white one aren't even real pole pieces. They're fake & under there are blade pickups.

I tried a white one like yours in burst finish. Loved it, so I ordered one with a burst finish, but it showed up with the pickups like in your photo above (the white one).
Didn't like the change at all & returned it. The other issue was the truss rod wheel wouldn't turn.
 
The first one is a pickup just like what is used in the Blacktop, right down to the yellow wrapper.

Normally bridge & neck pickups are paired so that they hum cancel, one being reverse wound.

Since they're both humbuckers, that shouldn't matter, but the size does. I'm not sure if the bridge pickup is longer than the neck pickup.
Sometimes they are to accommodate the narrowing of the stings as they approach the nut.

The 4-wire pickup also lets you wire it in parallel, which could be a nice way to balance the pickup outputs, in case that 2-wire pickup is lower output.