Both look ahead, but one tracks people while the other tracks systems
INFJs often notice emotional patterns, relationship shifts, and what something is becoming between people. INTJs often notice structure, leverage, and what direction will make the whole system work better over time.
Decision making usually reveals the center of gravity
INFJs often weigh human impact, timing, and emotional meaning more heavily. INTJs often weigh effectiveness, coherence, and whether the choice moves the plan in a sharper direction.
Stress makes relational tension and performance tension show up differently
An exhausted INFJ may become more tense around unresolved emotional patterns or disconnection. An exhausted INTJ may become more cutting, more controlling, or more irritated by what feels inefficient or directionless.