Everybody has more or less the same model.

What actually wins it is knowing where the other side is in their own head.

Knowing that a rival’s managing partner had the seller’s founder to his house on a Sunday tells you that it is late.

Knowing that he had him to the house twice in nine days tells you that it is nearly done.

Knowing that a specific name has started coming up on the phone in the evenings tells you which of four things he is worried about.

None of that is confidential in any sense a court recognizes.