Sometimes the simplest explanation may be is the best one…

Maybe there is only one Joe Biden, not two with different earlobes to differentiate.

Maybe Joe is wired and they use a “fake” lob and skin prosthetic / makeup to blend in the wiring to the ear? Note the line across his jaw leading to his ear in the single image.

Anyone have more images of the 2 Joes that may also show the line?