The night force is clearly going to be the better scope. That said, I have an original GEN 1 Athlon cronus when they were made in Japan by LOW. I have never, not once had that scope require re-zeroing. It’s been on a PRS type rifle, so certainly lived an easy life, But it’s been world’s more reliable than some of the other scopes I’ve owned, and is a completely different animal than the other athlon scopes Ive seen. I hardly use it at this point, tried to sell it a few years ago and nobody seems to want it, so resale will be lower. If you’re interested in buying mine, I might make you a heck of a deal, otherwise if it’s only a couple hundred bucks more you should probably get the night force.