ENTPs are more extraverted versions of me. They don't need to get away from socializing. They go out rather than spend time reading or writing. They don't look back to how they interacted with other people and fear they didn't do it well enough.
INTPs are more introverted versions of me. They don't need external input to function. They are more independent. They don't blurt out inconsistencies. They won't initiate contact. They don't like to speak for a public and be the center of attention. They don't need the reassurance from other people to know they are interesting. Instead of looking back how they interacted with other people, they feel awkward at the moment of the interaction itself.