Answer:
Due to the difference in color.
Step-by-step explanation:
The bronze statues 'Mars of Todi' appears less organic compared to the classical Greek statue 'Doryphoros' because 'Mars of Todi' is made out of Etruscan Bronze which (to the human eye) looks more made made, due to the use of bronze color. On the other hand, the classical Greek statue 'Doryphoros' is made out of Bronze which is sort of pearl-like white, which looks like pearl or stone.