Hmm. So I'm guessing from what you've mentioned about Socionic Si being different from MBTI Si, the functions themselves are interpreted differently in socionics as well? I thought it was just the function order, socionics in particularly wanting to tackle the introverted perceiver/judger problem in MBTI (which, upon reflection, makes more sense the way it's described in socionics). Does this have anything to do with the 'shapes' that classify types? Why are they called EIE and IEI? If it helps you to understand the theory more in explaining it to me, I'd be happy to hear you.
As for why the ENFJ thing is attractive to me, I think it's because I'd like to be a bit more socially refined and have a clearer perspective on things that I've already internalized rather than making things up as I go along. ENFJ and ENFP share very similar goals in inspiring and guiding others, which I do recognize as being a central part of who I am, but I'm more flightly than a typical ENFJ and I have a tendency to swing to extremes. Half the time, I don't even know what's going to fly out of my mouth until I've said i/wrote it and the conversation often goes somewhere completely unexpected. I adapt to whatever the situation calls for and don't express as much as I take in from others. I play fetch with myself; I fling ideas out there, see how it all fits in context, and run up to meet it rather than trying to consciously control the situation. I let the 'chips fall where they may.' I have my buttons, of course. I dislike it when people try to put me in a box or immediately try to code things for themselves when I'm just playing around with ideas and trying to understand things myself (I tend to have trouble with people grasp onto everything and try to fit it into their system when I'm like, no wait, I don't think you see the whole picture yet!) whereas I think a dominant judger, like an ENFJ, would walk in with more concise goals about where to steer the conversation.