Answer:
The answer is: The same materials, and the same religious theme.
Step-by-step explanation:
How are Michelangelo and Bernini's David similar:
1.- The same materials: white marble.
2.- The same religious theme: David willing to throw the stone with the sling to the giant, although the treatment and time chosen are different, according to the sensitivity of the time.
The answer is: The same materials, and the same religious theme.