The people of Kush lived South of the Nile River.
The Canaan people were manly using the Jordan River and the Mediterranean Sea, but they were usually at the Jordan River.
On the South side of Egypt is where the Nile River ran. There was also flat land that was great for farming. Also the Nile River flooded seasonally.
Egypt and Kush have very similar geography except when it came to the Nile River. In Africa the elevation was higher near the equater. Whitch means the father down you go down is the farther north you go because all rivers go down hill. So because it goes south to north instead of north to south people think the Nile River flows backwards.
In the Bible Canaan was considered the land of milk and honey or the promised land witch had everything they needed.