Its the total range of adjustment that is important not the graduation of the clicks.
If the Nikon has enough range which depends on the flatness of the cartridge you are shooting then there is just twice as many clicks in an MOA to make the adjustment.
I shoot a Weaver Tactical on a 270 AM w/ 1/8th clicks. It has plenty of range for the AM. (on the order of 20 MOA @ 1K w/200 yd zero) If the rifle is sufficiently accurate its a bit of a confidence builder to see the 1/8th MOA adjustment on the target. SEG
Free advice to not discount the IMPORTANCE of light transmission. The more the better, ALWAYS.
All of the scopes you are considering will track accurately but at the beginning and end of the day when the light is going down and the animals are coming out the scope that transmits more light and with the reticle of your preference will always be the better buy. Even if it cost more!
Spend that money right and you only have to spend it once.;)