Choose your own topic.
Consider what your topic has to offer your reader. Why should this comparison be interesting and/or relevant to your audience? Give me an example of something you’re thinking of comparing for your essay–now, try to give me some reasons why comparing or contrasting those things is even important? What do you hope for it to tell you? Why do you need to know that? How can it help others? If there are no differences–does that mean that the similarities suggest corroboration? For instance, if you read two articles on the same topic and they make the same points–does that suggest a consensus? If there is agreement, is there something in the agreement you can analyze to examine WHY that consensus is important?