Types · INFJ vs INTJ
Near twins: they share three of the four axes. The whole difference lives in Nature.
INFJ: You read people, and you move toward a picture of how things should be. · INTJ: You need to understand the system before you move — and you'd rather do it your way.
Where they clash
Nature — Head vs. bond (INFJ: F · INTJ: T · measures your Warmth)
INTJ decides by logic and criterion; INFJ decides by people and harmony. The typical friction: the bluntness of INTJ reads as coldness to INFJ, and the diplomacy of INFJ reads as circling to INTJ. The trick isn't for one to convert the other: it's agreeing when the moment calls for truth without anaesthetic, and when it calls for care first.
Which of the two are you, really? Measure it →
Where they rhyme
Mind (both I · measures your Social energy)
On Mind they land on the same side (I): both recharge alone: they understand each other without filling every silence, and they respect the cave without asking for explanations.
Energy (both N · measures your Imagination & openness)
On Energy they land on the same side (N): both live on ideas and possibilities: the conversation leaps from the concrete to the abstract without asking permission.
Tactics (both J · measures your Order & drive)
On Tactics they land on the same side (J): both rest with a plan and closure: what's agreed gets done, and that builds a very practical kind of trust.
But neither of you is a box.
This compares the archetypal types. Any of your letters could be sitting on the edge (near the midpoint), and there the label loses its nuance. The honest move: measure your real traits and compare your prisms, not the labels.