What is the main difference between the North African economy and the Tropical Africa economy?

The economy of North Africa has the following differences:

The production of oil and gas in the deserts, Egypt, Libya, Algeria, and also the production of phosphorites in Morocco and Tunisia are developed.
The cultivation of grapes (Algeria) and winemaking, the cultivation of figs and dates, and cotton are well developed.
Deserts contribute to the development of agriculture in oases and animal husbandry (camels).
There is an auto industry in Egypt and Morocco.
Tourism is developed (Egypt, Tunisia, Morocco).
There are practically no forests.
In tropical Africa, countries vary widely in living standards, from the poorest, such as Burundi, to the relatively wealthy, such as Congo Brazzaville and Equatorial Guinea.

The production of oil on the shelf and metals has been developed.

Logging is developed (Gabon), industry is underdeveloped, for example, the auto industry and tourism due to poverty, epidemics and local conflicts.