Superlative is used to compare a quality of a person or thing with everyone in their group, Example: 'Kim is the TALLEST student in the class' Tallest is superlative because she is being compares a quality of her, with everyone else included. While Comparative is used to compare two people or two things, Example: 'Kim is TALLER than Sue' taller is comparative because it is being compared between two people (or things)
