What are the key differences between the Giuoco Piano game and the Four Knights game in chess?

The key differences between the Giuoco Piano and Four Knights games in Chess are the opening moves. In the Giuoco Piano, White plays 1.e4 e5 2.Nf3 Nc6 3.Bc4, focusing on developing the bishop to attack Black's weak f7 square. In the Four Knights game, White plays 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6, aiming to control the center and develop knights before committing the bishops.