Well, if you consider cheapass stock doohickeys like those mounted in lowest end imports pickups, then yes, there are 2 pole spacings.
I personally don´t count those, but was speaking of Fender, D*******, Duncan, Kinman, Barden, and all the other vintage or aftermarket models. In other words, pickups that actually earn the description
That your APS and your SSL are spaced differently is intriguing, though.... I only know of one spacing for strats, have never seen a strat w/ 2 different spacings of the same pickup, nor does Duncan "officially" offer them in anything but Fender spacing.... Is it possible that one is an OEM pickup (or god forbid a fake)...?