Is ping the same when playing project reality and are in game settings the same ?
Is FPS in project reality higher than Fh2 ?
Is project reality utilizing less Ram than FH2 when gaming ?
In my opinion Win 10 = worst mouse feeling
Win 7 better and Win XP the best
If you are on win 8 or 10 try run CMD as administartor an type
bcdedit /set disabledynamictick yes
bcdedit /set useplatformclock true
Reboot PC
If its not making any difference. change back setting in cmd as admin
bcdedit /set disabledynamictick no
bcdedit /set useplatformclock false
If "bcdedit /set useplatformclock false" not working.Try "bcdedit /deletevalue useplatformclock"
Reboot PC
Hope that hepls :-)