Depends if you are going to be cranking on your scope a lot. If you are, the Bushnell has a bit more going for it in the reliability department than the Nikon. You can also now get the Bushys in mil/mil which is a plus over the mildot/MOA adjustment scopes. If you are going to be holding over most of the time, then I'd go Nikon. You might look into the older lines of Super Sniper scopes as well. I had a 16x that was reliable, repeatable, and had decent glass for the money.
YMMV.