"You were wrong before" vs. "you have been wrong before"

Question

Could you tell me if there is any difference between you were wrong before and you have been wrong before? For example:

Person A: I'll make the right decision.

Person B: Nah. You were wrong before/you've been wrong before.

Answer 1

To me, you were wrong before suggests that the speaker is referring to a particular occasion.

You have been wrong before means 'There have been some occasions in the past when you have made a wrong decision'.