To me the biggest differences are weight (NF wieghs a lot more), choice of useful reticals (NF has them), cost (NF costs more.) The differences you question are very comparable to me. The NF has a reputation for reliable tracking better than Leupold. My scopes are Leupold and they track fine. I have no use for the Mark 4 line. VX3 works for most of my needs. I do like the M-1 dials though.
Last edited by HiredGun; 04/24/12.
