My own anecdotal experience is that Copilot doesn't even do a good job as a chatbot. I usually only use it in a few occasions where I don't have access to ChatGPT/Claude.

And I could tell that. In one instance where I asked it to write a script that does a bunch of things, it provided a series of steps to do in the terminal. This is very off my typical experience with other chatbots. I immediately went to Claude which gave me a complete script that does exactly what I need.