Which 2 MBTIs are 1 letter apart and the most different? And most similar?

ESTJ and ESTP: 1 letter apart but so different. ESTJs I know are strict (kinda boring) rule following folks whereas ESTPs are the exact opposite - crazy daredevils who love to break all the rules.

OTOH, INTJ and ENTJ - so similar in many ways - efficient, future oriented, planning, articulate, thoughtful, system-building etc.