So today I am adding my dad Google account to my phone to check his email regularly because he is not very good with the phone. When I am done adding my dad account my phone automatically sync everything from my dad account to my phone like Calendar, Contacts, Drive, Gmail and etc. and I immediately turn off sync process. I am afraid this also sync my dad phone setting to my phone since we have different phones (also different brands). Does this also sync your phone setting? I don't see they sync anything about phone setting but I just want to make sure.
Every Google account has own separate sync and every such sync is per device. If you have sync enabled on Phone_A and on Phone_B you disable sync - sync on Phone_A will not be disabled.