A detailed description of the “class” system Marvel uses to describe superhuman strength, how it works (and doesn’t work) and how it aligns with DC Heroes numbers.
Writeups.org is an encyclopaedia of characters in genre fiction — comic books, video games, action movies, etc. It offers illustrated, researched profiles. These also include technical data for role-players. If you need a robust understanding of a character’s abilities, personality, history, etc. this is *the* place to be.