I have read that the "philtrum", (The philtrum (Latin: philtrum from Ancient Greek or medial cleft, is a vertical indentation in the middle area of the upper lip, common to many mammals, extending in humans from the nasal septum to the tubercle of the upper lip)length never changes and has been used in facial recognition programs.
The length of the philtrums in those pictures appears different, old Biden's is shorter, Faux Biden's is longer even though he has had plastic surgery on his nose.
Wearing a mask is very advantageous to hide this.