Any particular ways to differentiate them up to boot out there? Where do you draw the line between Fe and Fi besides the basic external traits associated with them. Like how users look. What is the major difference in interaction. Fe supposedly uses its values by defending the groups it feels attached to but what if those 'groups' just happen to agree with Fi? I've heard difference things, for example an INTJ told me that conversation with an Fe user drains him more. I wonder if that is related. Hope this makes sense.
Any ideas are welcome.