Keep in mind that the IOR scopes are 2nd Focal plane. Also my 2cents tells me to go with the Nightforce. I've looked through both and they seem to be about the same glass with both being equally Superb!. However I've heard a few different times that folks have had problems with Val, the US Distributor. Plus the NXS seems to be much more proven in the field. Saying that I'm still probobly going to buy a IOR at some point to try out. Just because they are about $500 less than the NXS.