What are the differences of ancient Egypt and kingdom of kush

Aside from location of their empire, the differences of the ancient Egypt and the Kingdom of Kush is the succession of leadership. In ancient Egypt, the pharaoh's eldest son was the rightful successor of the throne while in the Kingdom of Kush, the leadership was passed on to the brother of the dead king. The other difference is the treatment to their kings. In ancient Egypt, Egyptians treat their pharaohs as their gods, however; in Kush, the leaders were not treated as gods.