Yeah, all right, I will give example with functions, soo...
INTP in MBTI, INTj in Socionics and Jungs theory, or WE have these functions:
Ti Ne Si Fe Te Ni Se Fi
First four are the one we know about, the last four are those which we don't know about (well, relatively :P). Important in my theory are just First two and Last two functions, because those are the strong ones, so...
Ti Ne Se Fi
These can swap: 1st and 4th (Ti and Fi), 2nd and 3rd (Ne and Se). I was by myself Ti Se 2 years ago, now I am Ti Ne. Get it? Important in my theory are just first and last attribute of personality, every else can change trough life!
Ti, Fi, Te and Fe are Judging functions, and Si, Ni, Se and Ne are Percieving functions. We have functions Ti Ne and every else is not now important. For example ESTP (by MBTI theory) have functions Se Ti. Notice order of functions. While we have Judging function on first place, ESTP have Judging function on second place. This is the reason why do they seem to us stranger (and we to them too) [but it is not reason to hate them or something].
We are (by Socionics) INTj. I have added here this Jung's theory/Socionics, because it is simpler to divide people into these two groups, 'j' and 'p'. Yeah, for introverts is Socionics a bit harder to understand.
Summary:
In 'MBTI language': There are two groups of personalities. IP and EJ are the first group and IJ and EP are the second group (not depending on order of naming them). If you take two members of same group, they will seem each to other similar, but if they would be from different groups, they would seem strange to each other.
In 'Socionics/Jung's theory language': There are two groups of personalities. First group are 'j' and second group are 'p' (not depending on order of naming them). If you take two members of same group, they will seem each to other similar, but if they would be from different groups, they would seem strange to each other.
In 'Naming-personalities-by-functions language (sorry, IDK how is this theory named): There are two groups of personalities depending on the first function. The first group have got the judging and the second group percieving function on the first place (not depending on order of naming them). If you take two members of same group, they will seem each to other similar, but if they would be from different groups, they would seem strange to each other.
Hope you get it now...
If not, here is elephant of understanding to chase
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