Different interpretations, different usages, etc.
1. Different meanings: Extreme: means reaching the extreme or limit. Extreme: means reaching the highest level; representing the highest level.
2. Different usages: extreme: used to describe the degree, depth, breadth, etc. of things, which is a quantitative expression. Extreme: It is mostly used to describe the quality, realm, level, etc. of things. It is a high-level expression.