I've got a couple NXS,3.5-15x50mm & 5.5-22x50mm, both w/ the R1 reticle) and a BR,12-42x56mm w/ CH3 reticle).
The thing I don't like about the BR is the slightly smaller range of adjustment,compared to the comparable power NXS), and the smaller number of MOA per revolution,6 vs. 10). The front parallax adjustment is supposedly easier to 'fine-tune' due to the wider range of movement. I haven't had any problems w/ the 5.5-22x NXS thus far, so I don't know if I buy into that.
What I don't like about the NXS is the windage turret is labeled 0-1-2-3-4-5-4-3-2-1-0, instead of 0-1-2-3-4-5-6-7-8-9-0. I haven't yet used the NXS in a circumstance where that made a difference; I have used the BR in situations where I would have to watch that very carefully. One of the ranges around here is notorious for shooters having to do wind corrections in
revolutions, not clicks or minutes. Others seem to get by okay with it, so I may be worrying over nothing.
I've put a lot of miles on that BR 12-42x in the last year or so, both highway miles and rounds

the only major problem I had is one of the internal stops came unglued and started rattling around inside the tube, and blocking part of the light path. A quick trip back to NF fixed that,and changed the reticle from the original 2DD to the CH3 thats in there now).
I'm one of those people who almost never turns the scope down from max magnification for anything other than to see a wider field of view, like finding my target

After that... 42x is my friend, unless the mirage gets really, really, really bad,only happened once, and turning the power down didn't help my scores any either).
I've got a NXS 12-42x56 w/ the CH3 coming... should be here Monday, just in time to get it mounted and sighted in before heading to Canada!