Answer:
The main difference between India´s and Vietnam´s governments, is that are a federal republic and a Comunist state respectively.
Step-by-step explanation:
Federal Republic: This ideology basically states and defines itself as "a country that is governed by elected representatives and by an elected leader rather than by a king or queen", this definition gives to the democracy a main role in the political functioning of the territory, giving constant participation to the people in leaders elections, and other important decisions , besides providing different political options and parties to choose from.
Communist State: the main characteristic of this type of government is the single party style, the possible leaders all came from the same political groups, giving sometimes different ¨parties¨ as options to choose from but all of them coming from the same centralized power entity, due this, all the candidates to be elected in a communist State follow the same ideology (communism).
The people´s participation in political decisions tends to be more limited, and more when different dictatorships have emerged in this kind of government and way to rule.