After a few recent real-life experiences, I've come to a realization that the quasi-identical intertype is actually one of if not the most unpleasant in the socion. Please note that these experiences were of a professional nature, not of an intimate romantic one nor of friendship.
Why is the quasi relationship so bad? Even though being in the same club, at first it seems like you are "such similar people" and you get excited about similar goals and seem to think alike, what actually happens is as follows:
--the quasi not only does not provide your DS function, it happens to be their POLR, so they are polarized completely against that DS function you so need. This is in contrast to your conflictor and superego who at least deliver some of what you need from their unconsciously strong Id functions, whether they intended to or not.
--along the same lines, you dont deliver what the quasi expects from you, so not only are you suffering greatly from their enmity towards your DS function, they think your work sucks because your weak unvalued functions are what they need the most from you, and you can't provide that to them. In addition, one of those function is your own POLR, so you develop contempt for them, and their need for it.
--neither of you share any valued functions (which makes it even worse than supervision).
Gulenko's description of the intertype, found here
http://www.socionics.com/rel/qid.htm, describes the following manifestation, which I've found to be spot on:
This was my exact experience, and I dont wish it on anyone. Interestingly, in my most recent experience, there was a 3rd individual involved (the quasi's dual, and hence, my conflictor), and my interaction with the conflictor was actually more pleasant, believe it or not. With the conflictor, from the outset i thought he had a weird demeanor, and it seemed like we always felt we had to apologize to each other because it we always felt like we did something offensive to each other (the "oh it came across badly but they meant well" sentiment rings true), but he was actually quite helpful and supportive, and he seemed to be more of a friend in the end than the quasi was. It helped that I sort of made an effort to keep interactions to a minimum with the conflictor from the outset because I thought he was weird right off the bat, and perhaps that is a protective mechanism that does not come into play with quasis because they seem so similar to yourself, which then leads to greater suffering and trauma within the quasi interaction. In other words, with conflictors you never get psychologically close enough to get hurt as much as you do with quasi's.
In short, I found the quasi interaction to be very emotionally taxing, unrewarding, unsatisfying, and a good thing to be rid of. It was driving the usually happy me into a pit of despair, sucked the life out of me, and was turning me into robotic slave. In trying so desperately to meet the expectations of my quasi boss over the course of 6 months, I had literally lost sight of my own goals, desires, and objectives to the point that i absolutely hated what i was doing and the direction that it was going. Makes perfect sense now that this would happen, because my quasi's goals, desires, objectives, view, perspective, etc are actually different from my own (opposing quadra-different), even though they might have seemed similar at first. I now realize that what I saw initially in my quasi was the Id shadow to his ego functions and that deluded me into thinking we thought alike.