Is there any difference in gravity between making a rash judgment about a priest versus a member of the laity?
I don’t know but if a judgment is rash, why make it?
Sometimes a judgement doesn’t seem rash when made, but when new information is revealed the rashness becomes clear. Often a person won’t know that their decision was rash.
I would assume the gravity of a rash judgement is the same for both. However, in a rash judgement of a priest you also run the risk of losing your spiritual leader do to your own shortsightedness.