Final answer:
The primary similarity between the Mughal and Ottoman Empires was the enforcement of Orthodox Islam.
Step-by-step explanation:
A primary similarity between the Mughal and Ottoman Empires was the enforcement of Orthodox Islam. Both empires sought to establish and maintain a strict adherence to Islamic beliefs and practices. In the case of the Mughal Empire, Emperor Aurangzeb reversed the policies of his predecessor, Akbar the Great, and promoted orthodox Islam, discriminated against Hindus, and suppressed religious minorities. Similarly, the Ottoman Empire was known for its enforcement of Sunni Islam and its imposition of Islamic law, or Sharia, on its subjects.