How do we know when to select 1) Full Repair vs 2) System Files Repair?

During an Internet search to come up with an answer, I came across a screenshot of an older version of Systemback that has a more detailed description for these options. Based on what I saw, please let me know whether or not this guess is correct:

1) System Repair: overwrites /root with files from previous Restore Point

2) Full Repair: performs the above action, plus overwriting user configuration data in $home, from contents of previous Restore Point.

Please let me know if this is correct and if not, could you explain what one may expect, when selecting these options?

The earlier version's legends seemed to be more descriptive -- if the above interpretation of 'what's happening' is correct.