I haven't read very much on the more in depth books on mbti. I'd like to.
I think I read berens about the differences between Ti and Te. And those more or less equated to the same understanding I have of socionics Te and Ti.
I'm fairly certain the systems are the same. If you take 2 people and observe humans over a long period of time to develope a typology system, how different will they really be?