I gotta disagree with Bigbulls and Hometheatreman here... Richwrench has a good point about the Nikon's rivalling "top dollar leupolds"... Both of them are TERRIBLE for parallax from an optics stand point, and both of them are TERRIBLE at tracking!

As far as the overall quality goes, of course, the pro-staff is, at best, an entry level scope and of course, the leupold offers MUCH finer optics, finer quality, better light transmission, better clarity, etc etc than the bargain bin prostaffs, but in my personal experience, neither are very user friendly when it comes to parallax or tracking.