I just picked one up in 2.5x10, it's for a project that is waiting on a barrel so I haven't shot with it yet. The only other "quality" scopes I have to compare to are Zeiss Conquests.
That said, I have has the two side by side late in the evening and in the middle of the day. I think the Conquest has slightly better glass and light gathering ability plus it seems to have a little "crisper" picture, but only very slightly.
As for the adjustments, the Nikon has much stiffer turrets, not sure if this is because it's brand new or if they're designed that way. The side parallax adjustment knob has no numbers on it just a series of dots going from largest(up close) to smallest(infinity) not a bad thing just not what I'm used to.
Both brands seem to be very solid products and if I could have gotten a Conquest in 2.5 or 3 X 10 with target turrets I would have gone that route, however I can't say that I'm disappointed with the Nikon nor do I feel like I "setteled" for second best, It's certainly a quality scope in my opinion.
Chris