What is the difference between a High King and an Emperor?

What is the difference between a High King and an Emperor?

What is the difference between a High King and an Emperor?

A High King and an Emperor both rule over other lesser kings. If they are similar culturally (language, customs…) it is considered a High King. Where they differ significantly, it is considered an Emperor.

If the subordinate rulers take lesser titles (such as duke or count) he is a King.