Look at the model.

1) Rationallity

Duals both favor the same rationality, either perception or judgement, so they are on the same page about WHEN to observe and WHEN to judge. With conflict you are on the opposite. One wants to decide, the other wants to keep seeing. This makes it difficult to even talk.

2) Conscious vs. Unconscious Blocks

Duals and conflictors are flipped along the conscious axis. Dual's ego is conflictor's id and dual's super-id is the conflictor's super-id. This makes flights between duals a fight between conscious and unconscious functions while a fight between conflictor's a fight between conscious and conscious, and technically unconscious and unconscious functions. The former is preferable to the latter.

3) Valued vs Non-valued Functions.

You value your dual's ego block while you do not value your conflictor's ego block.