I'll never understand putting zero stops on a target scope. You certainly aren't in a hurry or dialing in the dark, and they add $250 to the price of a NF, and in the 5 yrs I've been shooting my NF Comp scope I've never used it. Don't know how to set it and don't care. Zero stops started showing up about 10 or 15 yrs ago and since then everyone thinks you have to have one. I used to keep one of my scoped zeroed at 1000 because that is where that rifle got shot 90% of the time, I dialed down for 600, 800, 900 and 1000.
With Night Force, compared to the BR scope the NXS has 10MOA per rev on the turrets, the BR has 6MOA. If you shoot to 1000 yards and the wind ever blows to more than 12MPH you will learn why that's a big deal, at least to some of us. Coming to the line in the next match with the windage turret a full turn off is troublesome.
The BR has parallax adjustment on the objective, the NXS has it on the side. You may or may not have a prefrence one way or another on that. I think the NXS is a little lighter than the BR.
The NXS is a coupls of oz lighter than the BR but both are in the range of 35oz±. The Comp scope and the GE are in the range of 26oz±. In F-TR that's a lot of weight that you can use somewhere else.
NXS and BR scopes are illuminated, I didn't know my NXS had it for about 3 yrs, and I've never used it in the 9 yrs I've owned them (two of them).
The NP-2DD reticle was the most popular reticle that NF made for shooting F class. The new DDR-2 in the Comp scope is just a copy, and a lot of people will tell you (self included) that they didn't need to change anything. The new one isn't better, just slightly different.
All track great, the didn't become the most used scope in F class by being slouches.
The Vortex GE is a great scope, and can be gotten for about 1100 to 1300, that's less than you can get any of the NF models. I think the glass is on par or slightly better than the older NF models.
The NF Comp has the best glass, and it has a zero stop if you must have it. I really noticed this last yr load testing. I use ¾" Avery label dots for aiming points when I test at 300 yards. I put a black dot in the middle with a sharpie to hold on when I shoot at 100. I had a sheet with the black dots on them that I used to test one day at 300. Shooting 2 rifles same session, one with a GE the other with a NF Comp. Only the comp was able to resolve the black dots. That said, I shot the highest X count in F-TR last yr at the Mid Range FCNC with my GE, so I don't think that little bit of resolution difference matters much.
I own 2 NF Comps, 2 NXSs, a GE and an 8-32x NF BR. These days the NF Comp scopes ride my Long range F-TR rifles.
[edit] All of my opinions and experience above related to the NXS are with the 42x version