Final answer:
The Mandate of Heaven ensured stability and legitimacy of the rulers' reign in China, while the Roman practice of deifying emperors enhanced political power and centralized authority.
Step-by-step explanation:
One advantage of the Mandate of Heaven was that it ensured stability and legitimacy of the ruler's reign. This concept allowed rulers to hold the throne with the approval of Heaven as long as they were virtuous, attended to rituals, listened to wise advisors, and ensured the well-being of the people. The Mandate of Heaven also created a basis for political unity among the Chinese and facilitated the peaceful transfer of power between dynasties.
On the other hand, one advantage of the Roman practice of deifying emperors was that it enhanced political power and centralized authority. By deifying emperors, the Roman Empire strengthened the ruler's authority, making it easier to govern and maintain control over the vast empire. It also added a religious element to the rule, further solidifying the emperor's position as a divine figure.