the 59 is two conductor so if you want to split it, then you need the harder to find 4 conductor version.
Pg is a sweet, deep and warm humbucker, but i think split it wont suit the modern styles i'm guessing you play (given that you play a JS). Pg's are warmer sounding humbuckers than 59, but the 59 sounds pretty good split (i had a dual 59 splittable combo in a strat).
Its pretty hart to recommend one or the other because you have not told us anything about the style of music you play, or what kind of amp rig you use but actually,
i think the best pickup for versatility in a modern axe would actually be neither the 59 nor the PG.
Check out a Jazz neck. Failing that, then probably a 59 rather than the PG.