I don't know yet. Were going out in the am for a little head to head. I'm gonna run the nox and dad on the ATP. He has a few hundred hrs in on it. We shall see.Nox seems the rage this year as the AT (Pro & Max) fade in enthusiasm. Are the really as much better as this post would suggest? I’ve found several silver dimes at about 6 inches over the past couple years with my AT Pro, so maybe it was just missed in the previous saturation pounding of the site by Tlh and Dad? I’m very interested in what else the 800 detects that was previously missed and what that does or does not indicate between the detectors. Thanks!