a major difference between monarchial power and a republic is
Republic A republic (Latin: res publica) is a form of government in which the country is considered a "public matter", not the private concern or property of the rulers. The primary positions of power within a republic are not inherited. It is a form of government under which the head of state is not a monarch.[1][2][3]
Monarchy of the United Kingdom The Sovereign's role as a constitutional monarch is largely limited to non-partisan functions, such as granting honours. This role has been recognised since the 19th century. The constitutional writer Walter Bagehot identified the monarchy in 1867 as the "dignified part" rather than the "efficient part" of government.[7]