I've not used a Nightforce. The only SWFA that I've had is the 3-9X42SS HD. Though possibly a touch behind top end Leupold for viewing deer at last light, it was plenty good for actually shooting a deer at any legal light. Since I value dependability,ruggedness,and repeatibility of adjustments above just a view,I deem the SWFA superior to any Leupold. I have gathered through my research that NF is even more better.LOL