Historically, the restore option intended use was solely to prevent auto detection.
Later the default location of the tce came in use and thus it too prevents auto detection.
Currenly tce dir trumps the verb restore for the purpose of keeping things simple (KISS).
However restore can trump, with the caveat, that user error does not halt the boot process. Thereby the chance to overwrite the wrong multiple copy of backup is possible, of which I was trying to prevent.