I would really like to know how many of the guys having glare issues have the optic mounted to a rifle and are looking at game animals in the field or are they sitting in a building looking at lights!!
Having laid in the grass looking at animals through Nightforce, SIII and Vortex optics
I have not seen what they are talking about, we used the SIII and Vortex a lot this year and didn't not get a shot on an animal due to glare or contrast. My buddy shot an antelope at 925 while she was standing up hill from us in a patch of light grass and sage, pointed right into the sun on a clear MT morning and he had no issue picking out small details on the goat as we decided shot placement and then watch the bullet land.
Same thing with contrast, we laid in a ridge watching elk mingle in some dark timber and we had no issue with the SIII picking which bull was best at 1200 yards then taking them when they were at 800, you don't access the horn difference on bulls in the dark timber with a poor optic and we had no problem!!!
IMO the difference in the Nightforce and SIII are zero stop, windage turret layout and over all ruggedness and glass is the least difference in the ones I've used of the two.