I ran it with the settings "NvColorControl.exe 10 RGB 2" and the image looks the same as my Quadro K4200 now.
1) can you say that the fonts become more thin and sharper after this action?
2) does it create a registry branch:
with the variable:
3) You only need to run the NvColorControl.exe once or every time you restart/login for the desired effect(image looks the same as my Quadro K4200) ?
4) Does this setting go off after actions like changing resolutions, starting games, sleeping?
5) Does your monitor support 10 bit color ?
I still need to test it under Windows 10 to see if NvColorControl helps, but on my Windows 7 installation it made a huge difference.
6) As far as I know, the Quadro series drivers have a built-in options in the driver GUI interface, which allows you to enable and disable dithering without additional programs.
Do you see this GUI switch?
It is possible that the default GUI dithering switch value of K4200 is different from A4000 ?