IMO the best buy in the Vortex line in that4x12 power ranges is in the Diamondback HD....has 4" Eye Relief too. The upgrade from there is a Viper HS at mo money, an I really like my Viper HS 30mm 4x16x44 SF and the same thing in a 2x10x44 w/out the SF I bought on a Cabelas' deal w/ free Warne rings last year.
Can't say nuthin'about the Nikons...I got lost during the name changover to Prostaff ??? what number means what in features couple years back...and moved into Minox where I could (not quite as good as MeoPro but cheaper) and Vortex.
Remember Aesops Fables of the "Scorpion & and the Frog's" crossing the river...
... we must hang together, or we will ALL hang seperately, Ben Franklin..
Those who fail to learn from History are doomed to repeat it,Santayana