I have not used the S&B, but have the Nightforce in SFP, and the Vortex Razor 2, and IMO, it boils down to usage, rather then one better then the other. Both are amazing scopes. No wrong answer here. I took me a couple range sessions to really dial in the Vortex and the Nightforce was easier to be comfortable with right away. Only tiny nitpicks is that the Nightforce ocular ring moves when you dial mag which bugs me but doesn't really effect sight picture, and the Vortex has horrible plastic scope covers. Vortex also has that little bit more noticeable mag when you sit them side by side too. Could easily see 223/308 bullet holes at 300 yards with both though.
If I had to choose only one though, .....I really couldn't?? Rate them both 99 out of 100. Would love an S&B too, to compare, maybe one day.