Compare his Christ in the "Final Judgment" or in the "Pieta"
to the portrayal by Michelangelo's contemporaries Verrochio and Da Vinci.
Later artists, like Caravaggio, would follow Michelangelo's example and depict Christ as a large man.
I would be very surprised to find that this is a Michelangelo.
Agree.
Just keep Dan Brown away from it.