I was really worried when I got into long range shooting to buy used scopes. I am generally NIB only guy and buy from reputable dealers, for that reassurance that it will be okay. A couple of years later and A LOT more education on my part as far as knowing what I am looking for and more well educated on buying used optics online and I feel comfortable buying and selling them. I know that I want to be able to move scopes that either don't fit my needs anymore or I just want to chase a new shiny object and I will need to sell them. I want people to trust my that I would shoot straight with them on the condition of the scope and why I am selling it, I figure if I want people to believe me and my story then I need to believe them when they tell me the same thing back on a scope I am interested in.
I have not owned either of the scopes you have mentioned but have been around them at matches, and owned several Gen 1 PST scopes. As was stated I would probably lean towards the Gen 1 Razor on glass clarity, but I think the Gen 2 PST has lightly better turrets since they are modeled from the Gen 2 Razor. Might be also looking at something like the Burris XTR2 series, maybe the Nikon FX1000 scope, and possibly a few Bushnell options. I owned a fair bit of Vortex at one time but have since sold all of it off, nothing against the company, most of it was just wanting to take the next step up in glass quality, Swarovski, Kahles, Leupold Mark 6 line, etc.