differentiate between the presidential system of usa and parliamentary system of britain
The main difference between a parliamentary and presidential system of government is that in a presidential system, the president is separate from the legislative body, but in a parliamentary system, the chief executive, such as a prime minister, is part of the legislative body, or parliament.arliamentary Systems. The roles of head of state and head of government often are held by different people in a parliamentary system. For example, a country might have a prime minister who acts as its head of government and a monarch who acts as its head of state.