The difference between Persians (Iranians) and Arabs: Language: Persians speak Persian and belong to the Indo-European Iranian language family (like most whites). Arabs speak Arabic and belong to Semitic language family (like Jews and some ethnic groups in Africa). Race: Persians mostly belong to the southern Mediterranean type of Europa race. Most Arabs belong to Europa's Mediterranean type, and there are also a few Arabs of mixed blood. Religion: Arabs believe in Islam and a few believe in Christianity. Persians believed in Zoroastrianism in ancient times, but now they believe in Islam. Origin: The ethnic origin of Arabs can be traced back to the ancient Semitic tribes. History is related to Assyrians, Aramaics, Canaanites, Phoenicians, Hebrews (ancestors of modern Jews) and so on. Persians originated from ancient Aryans. Of course, today's Persians and Arabs are definitely very different in appearance from their ancestors, because in the process of development, they constantly absorb elements from other nationalities.