What is the difference between Pithecanthropus and modern man?

There are many differences between Pithecanthropus and modern man. The most important thing is the external difference, because modern man walks upright, while Pithecanthropus walked hunched over. The shape of the skull is also different, in Pithecanthropus the jaw is pushed forward, and the skull is slightly larger. Pithecanthropus has significantly more body hair. And Pithecanthropus did not know how to talk, but could only make sounds. In addition, it should be mentioned that Pithecanthropus did not differ in intelligence and ingenuity, so there are many differences.