I tried to backup my profile on my a95x unit and restore it on my sons INTEL-NVIDIA LIbreElec v8.0.2 based media center and it just made the unit freeze in a blank screen with a mouse in the middle.
I had to end up reloading the unit with libreelec and restoring the profile backup I made previous to attempting the migration of my profile.
I have come to the conclusion that you will just have to reload everything and reinput all your API keys and Reauthenticate all your service all over again if you with to have everything the same on both units.
Unless someone comes up with the right mix of the proper files and directories to backup and restore, so we don't backup any hardware settings also that might affect the other units; there might not be a way to properly do this.