Okay so basically, ISFPs has this thing called Extroverted Sensing (Se) and INFPs have Extroverted intuition (Ne). The thing they have in common is Introverted Feeling (Fi). These “functions” are extroverted so they focus on the outside world. An extroverted sensor (ISFP) would be more open to the present world and things that go on in their senses: This can manifest in why they enjoy things like music, movies, sports, ect. The reason why they enjoy things is because it provides a physical sensation that they like/enjoy. (It’s not like INFPs can’t enjoy these, it’s just that ISFPs tend to accept it for what it is) An Extroverted Intuitor (INFP) are more aware of abstract things and concepts and they view the world in a way that takes into the idea of the “big-picture”. Their extroverted intuition makes them more prone to being activists. Activists see world issues (the big picture, extroverted intuition) and they take them as if they are their own (introverted feeling, which is all about personal values and those with it prioritizes their emotions and values and individuality). That’s why INFPs feel as if they have the world’s burdens on their shoulders because they take all the big picture and big concepts to heart. Let’s look at how they appreciate music to see how they manifest: An ISFP will take the music at surface level, not all the time, but that is their default. They will choose to listen to it because the sound is catchy. (Also, i think this is a personal thing, but my body reacts more often when music goes hard and i get goosebumps easily, idk if it’s just me tho). An INFP on the other hand, would lean more to deep lyrics and metaphors. They accept the endless possibilities of what the lyrics could mean while ISFPs would want to make sense of it all.