Yes or No?
INFJ focus is inside the people around them (those people's hearts and souls and the origin of their deeds.) INTJ focus is outside the people around them (those people's computers, their chairs, their military maneuvers).
And there is a fine and fabulous distinction to be made between thinking and feeling. I don't know what it is, but there is one. Something like feeling is affective and thinking is... deductive?
The distinction is obscured by no INXJ ever really using exactly only one function at a time. Dunno about INXPs. They may get away with it somehow. In any case, perhaps Thinking and Feeling are convenient labels for when one function is clearly the more controlling.
I may be making this up.