The differences (in my experience) are mostly:
1. Personal config files in $HOME (filenames and directories usually starting with a dot, so are hidden)
2. System config files (like those for Xorg or Nvidia) in /etc/X11 or /usr/share/X11/xorg.conf.d or other locations mentioned in the documentation: http://manpages.ubuntu.com/manpages/focal/en/man5/xorg.conf.5.html
The differences (in my experience) are mostly:
1. Personal config files in $HOME (filenames and directories usually starting with a dot, so are hidden)
2. System config files (like those for Xorg or Nvidia) in /etc/X11 or /usr/share/ X11/xorg. conf.d or other locations mentioned in the documentation: http:// manpages. ubuntu. com/manpages/ focal/en/ man5/xorg. conf.5. html