Here are some points for you to construct a table.
1. Ho Chi Minh was the President of North Vietnam while Ngo Dinh Diem was the President of South Vietnam.
2. Ho Chi Minh was President from 1945 till 1969. Ngo Dinh Diem was President from 1954 till 1963.
3. Ho Chi Minh was a communist while Ngo Dinh Diem was a staunch anti-communist.
4. Ho Chi Minh wanted to unify Vietnam under communist rule while Ngo Dinh Diem sought to create a government based on democratic and capitalist principles.
5. Ho Chi Minh died in 1969 due to natural causes. Ngo Dinh Diem was killed in a coup in 1963.