Your post prompted me to get the Nitrex and my best low light scope (Ziess Conquest 3X9X40) out of the safe as the sun was going down and it preformed better against the Ziess than I would have guessed. Both scopes were set at the lowest power and I had a flag pole and a fire plug that were around 150 yards that I used for a focal point. My testing consisted of picking up one rifle then the other and looking every 5 minutes or so until it was well after 1/2 past sunset (our legal hunting hours). The Ziess edged out the Nitrex by a little, but it cost considerably more.
My scopes stay on the lowest power when hunting unless circumstances dictate otherwise and even then they are rolled back down after the shot. Bad experience with a scope ramped up 30+ years ago and never forgot that lesson, LOL.
I always seem to come to one conclusion with rifle scopes, you pay disproportionally more to get a little more performance. Once you process that fact it's all what you can afford or want to pay. Best wishes with whatever you decide.