General Description of Quasi-Identical Relations
Quasi-identity is an intertype relation between two people from opposing quadras who have similar, but not identical functions, and no suggestive influence over the other. Partners typically have a lot to say about the same kinds of topics (as do, typically, any members of a single club), and their conversations gravitate to these common spheres of interest, but they take entirely different approaches to every subject. They both take note of the same phenomena, but describe and analyze them in completely different terms that the other finds interesting, but completely unsatisfying. This is because the language and approach of one partner's leading function corresponds to the strong, but undervalued demonstrative function of the other. Each partner tends to be impressed with the other's skillful use of his leading function, which they perceive more as a "performance" (due to their own attitudes toward their demonstrative function) than a sincere and honest expression.
In closer interaction, partners' instincts are to want to correct the other person's approach and redefine the issues in completely different language. This leads to a feeling of being under-appreciated by the other. Partners are easily drawn into quite personal conversations because of the sense that the other person can relate to them, but this psychological intimacy can easily disappear without a trace when aggravation about something the other person does finally boils over and partners allow themselves to express dissatisfaction with the other. This can lead to disappointment and a feeling of betrayal of trust or lack of loyalty when partners suddenly don't want to be around each other or maintain the relationship anymore because it drains them.
While generally sympathetic towards each other and sharing many of the same weaknesses, quasi-identicals are almost unable to offer meaningful assistance on a personal level, and quickly become annoyed with each other's expectations, if any. Furthermore, the solutions to their emotional or personal problems are always radically different. For instance, an EIE must "get himself together" and stop being idle or hesitant, while an IEE needs a change of pace and some new diversion. If each tries to implement the other's recipe, nothing comes of it.