The only Nightforce that rules, IMO, is the ATACR. The SHV is more on par with Vortex Viper PST II. And the NXS (although still a solid scope) is quickly becoming outdated. The Vortex Razor Gen II is really just as much of an optic as the ATACR.
There is much more to a quality optic than glass. Many scopes today have high quality glass. Chromatic aberration is usually the only variable that I've noticed between different high end scope glass.
How they track, eye relief, weight, turrets, features, durability, etc, are more variable than straight glass quality IMO. I have an Athlon Cronus that visually has better glass clarity than Vortex Razor, and just about on par with ATACR. But it doesn't mean it's a better scope. Still in the testing and trial phase.
back to Vortex, they completely hit a home run with the Razor II. It's currently the most popular scope on the PRS trail and is an exceptional value that makes it hard to pass up when comparing to an ATACR F1.
I love S&B PMII scopes but they have all but priced themselves out of the Tactical / long range scope market. They seem to still rely on .gov / .mil contracts however.