In the IELTS Reading test, "Comparison" is not always a standalone question type like "True/False/Not Given." Instead, it is usually embedded within other formats, most commonly:
Here are some additional tips and strategies to help you answer Tertiary Comparison Guide questions: Tertiary Comparison Guide Reading Answers Ielts
Example: Which paragraph contains the following information? In the IELTS Reading test, "Comparison" is not