I should hope that ifg their previously owned theyve both had pup heights tampered with. Or more corecctly adjusted for personal sound pref. Generally pups closer to string gives a little more bite and output. Too close give a damped sound, esp to sustain rolloff. Further away from string can help cut treble a little but lowering also cuts output a little bit to.
The key is to adjust each pups height for both sides for best sound to you solo. Then make little adjsutment for both pups blended full on. If that sound is little darker then you want. Raise bridge pup a little or lower neck pup a little. Try quarter to max half turn. The reverse if the both pups full on is little to bright. If you find you want to adjust tonal char between E&A side compared to D&G side, just adjust that side of pups as follows. If you want D&G side a little les bright without affecting tone of E&A string. Simply raise the neck pup a tiny bit on that side and lower bridge pup a tiny bit on that side. Reverse for opposite and of course you can figure it out to adjust E&A side to taste.
If your wanting to adjust output balance of one side, For less output lower both pups on that side a little. Or if wanting higher output on that side, raise both a little.
The choice of which side of pups and which pup to raise or lower by this formula. Can be guided by to simple rules. 1. Dont raise a pup so close to string that it dampens sustain or creates that odd overpowered not musical sound. Dont lower a side or whole pup to the point that your getting somewhat muted,muddy, or weak sound.
Adjust string action first for playability pref and any desired tone char diff that lower or highr action gives relative to fret clank etc. Then adjust pups after that.
Factory stock specs are generally middle of the road, average, bland ones in most cases to me. They have nothing to do with "ideal sound".