The Argentine struck twice in victory over AC Milan.
"For me, Gonzalo is a true champions," Bucchi told TuttoMercatoWeb. "I agree with [Gabriel] Batistuta that he is better than (Edinson) Cavani.
"The lad's extraordinary and has filled the void left by Cavani brilliantly. It's great to watch him. He's a real danger for opponents.
"I see Cavani is a more individualistic forward - more selfish. He was very central, whereas Higuain is all over the pitch participating in team play."