We are considering Chat BOT implementation. However, we are not sure which tool gives what features and when we need to choose. (listing, comparison of Microsoft Bot Framework Vs Power Virtual Agents) Can you please provide the same?
If you are looking for a no-code or low-code solution for building chatbots, you can use Power Virtual Agents or Microsoft Bot Framework Composer. The difference is that Power Virtual Agents is a part of Power Platform which has additional licensing. Microsoft Bot Framework Composer does not have any connection to Power Platform or Microsoft 365 environment.
If you want to code everything from scratch and control all aspects of development, Microsoft Bot Framework is a choice.