The 7-35 weighs 1.5oz more Than the 5-25, that's nothing to worry about. What is to worry about. On a shorter range shot, and you're in low mag range, the reticle will be very small on the 7-35. Where the 5-25 will be larger on equal powers. I shoot the 5-25atacr in MilC, love everything about it, cept the weight. Also have nx8 4-32x50 in mil C. Glass isn't as good parallax needs constant adjustment. Anything about 25x darkens very quickly. Anything below 7x reticle is so small tough to use, so the scopes basically a 6-24x optic in a spot where the optic performs.
10oz is a big weight penalty between em, but the glass on atacr is very good. Their reticle choices are some the best out there, turrets are good. But my scope parallax is very stange at the 25x and 500y target my parallax is maybe 175y setting. I rarely have to go past 400y on parallax dial to focus out to almost a mile. That is odd but not necessarily a bad thing.
Scopes that rival or exceed atacr:
Khales k525i
Minox zp5
Swaro X5I
Vortex amg
Mk5hd
Xtr3
Those scopes are all in same price range or cheaper than NF, but have glass and features that compete with their atacr line. The place where the NF falls short, low light performance. The khales minox and even mk5hd will exceed here. The mk5hd is noticeably lighter with locking turret. Idk there are so many options, nightforce is a **** good overall choice, they just tanks. I have 2x NF, a khales, 4x mk5hd, 2x xtr3, and prior owned a few AMG. My order of scope criteria :Tracking, low light performance, Reticle, weight, FOV. In this price point glass should all be great, so glass isn't a priority. I'll work with something that has a bit less resolution or more CA to have a scope that works better 30 mins after sunset.