Even without detailed comparisons, a "Related projects" section is very useful to the user. Sometimes I see such a section with comments on the other projects l

Even without detailed comparisons, a "Related projects" section is very useful to the user. Sometimes I see such a section with comments on the other projects like "ProjectA: in case you want features X and Y", or "Project D: emphasises minimalism and configurability", and that is both immensely useful and increases my confidence in the current project whose README I'm looking at. It makes it clear that the author has your best interests in mind and understands their project's strengths and weaknesses.