Re: The difference between a neck and bridge pickup
There really is no difference between bridge and neck humbuckers other than output and eq and while some pickups are designated as bridge or neck, that is to identify position in matched sets. Any pickup really can be used in either position, but you might not like the tone if you go too hot in the neck.
Bridge pickups in matched sets are usually a little warmer and have more output to balance the pickups out. But if you wanted a slightly warmer, slightly hotter 59 in the neck position you could use a 59b and a then hotter pickup like a C-5 in the bridge.
It doesn't make sense to put a 59b in the neck and visa versa in the same guitar, but you could I guess.