1, the usage is different: listen is an intransitive verb, which needs to be followed by a preposition with people or things as the object, that is, listento. For example, listentomusic, listentome, listentotheteacher, and hear is a "transitive verb", which is just the opposite of listen and can be directly used with nouns, such as hearme, heartheteacher.
2. Different meanings: Listening means listening consciously and carefully, trying to understand what you hear, paying attention to the process of listening, and paying attention to the action of listening (whether you hear the unknown). Listening means "listen, listen", the physiological reaction of listening, and pay attention to the result of listening.