Generally, a new type of government is established when its earlier alternative fails to fulfill the needs of citizens. When such a type of government is established, the positive attributes of the previous government are retained whereas, the negative attributes are changed. Similarly, Presidential Democracy and Monarchy were established. So, what exactly is the difference between Presidential Democracy and Monarchy? These two types of government are differentiated based on factors like definition, ideologies, characteristics, structure, etc. The widely used definition of Presidential Democracy is "A system of government where the executive branch exists separately from a legislature" whereas, Monarchy is defined as "Government led by a king or queen".