What represents the greatest difference between donatello's, michelangelo's, and bernini's sculptures of david?

Many European artists have created their own versions of David, the killer of Goliath. Donatello's David was made in bronze and was imagined after the great fight. Michaelangelo, s David, on the other hand, symbolizes a confident man before the fight. Bernini's version is a clothed David and was depicted during the fight. This was evident on the contracted muscles and the angry expression of the face. It was as if David was about to throw the stone towards the giant.