Similarities in the development of the culture of Byzantium and the Arab Caliphate?

Both Byzantium and the powerful state of the Arabs combined and adopted the cultures of the conquered countries. The unification of culture took place under the influence of a single religion throughout the country: Christianity in Byzantium, and Islam in the Arab Caliphate.
The development of architecture was characteristic of both empires, great successes were achieved in military affairs. In the field of science, Byzantium and the United Caliphate were far ahead of neighboring states, which allowed them to be dominant states in their regions for a long time.