Steve,Welp, we can start that definition here with Andy's collection of Korth revolvers.
I did not come up with the term "top notch". Chandler quoted a part of my post, making it appear like I did but he obviously had not read or comprehended the whole thread but instead rushed to comment.
You have a Walther PP Super, basically the same design like a CZ 50, CZ 70 or FEG AP. I do not know but assume that you have experience with at least one of the other mentioned guns. When directly comparing those guns, the term top-notch will be apparent, especially in double action mode.
As it will be when comparing a very serviceable RIA 1911 to a Les Baer, DW, or Nowlin.
Or a Ruger GP100 to a Manurhin MR73 or Korth.
Or, as I mentioned an SP-01 to a Sphinx AT2000S.