The non-PST version has 12MOA per revolution instead of of 25MOA, and 5MOA less total evolution (that's 50" at 1,000yds), also the turrets are capped instead of exposed. So, turret design is quite different and that ain't a cheap part of the scope.
Ah, good point - thanks for that. I did find a YouTube video from an owner of the non-PST version and he detailed his dislike for the turrets on that model. Said they can easily be bumped and moved if the caps aren't on it, and that to reset it back to zero you lift the cap (spring-loaded) so if you aren't careful, you can change your zero and not realize it. Basically it sounds like the PST is more suited for hunting than range work. May be worth the extra $ to go with the PST. Plus, and I'm still learning why this is a big deal, but the PST has an MOA reticle with MOA turret adjustments, where-as the non-PST is Mil dot / MOA.
Looks like I may have finally picked a scope. I appreciate everyone's help and input.