Ruler Vs Emperor

An Emperor is known as the ‘king of kings’. So king or a ruler is lower in designation to an emperor. Often in the histories and epics, the emperor is a very powerful person in comparison to a ruler. The major difference in power is due to the number of countries being ruled by the person. The ruler rules one country or a group of states, while an emperor rules many countries. So the emperor is considered mightier than the ruler in this respect.

When a ruler rules a country, it is known as his kingdom. But when an emperor rules, he will be ruling a group of countries, and these are collectively known as the Empire. The Roman Empire is such an example. Another example to differentiate between the empire and kingdoms is the rule of the British Empire in India. The people from the British Empire were ruling the kingdoms in India while there were many small kings in the country.

Therefore:

1.Emperor is higher in rank and honor than the King.
2.Ruler rules a country, while emperor rules a group of countries.
3.An emperor rules an empire, while a ruler rules a kingdom.