Difference between trans saharan trade and Indian Ocean trade?

The Indian Ocean trade involved the Swahili Coast (along Eastern Africa), the Spice Islands (Southeastern Asia), India, China, and the Middle East.

The Trans-Saharan trade involved the Western Africa empires of Ghana, Mali, and Songhai, in that order, and Northern Africa. They also interacted with the Arabs.

The Indian Ocean traded mainly traded cotton cloth, textiles, and spices like pepper, cinnamon, cloves, and nutmeg.

Trans-Saharan trade exchanged mostly gold from Northern Africa for salt in Western Africa. It also traded ivory, slaves, and exotic animals.