[1] It would depend a bit on what sort of pastor and what sort of congregation.
You'd expect Pastors or Ethicists to be more moral/ethical because they spend a lot of time thinking about being moral/ethical compared to members of the general population. Seems pretty intuitive to me.
Pastors... it depends on the pastor. Is it a job, or something they actually believe? Is it just a theory to them, or do they have any actual power helping them live it out?
In fact, on this interpretation, if we find ethicists are no more ethical, then we must conclude they are actually _less_ ethical than normal people, since they have more occasions where they could make an ethical decision but do not. Or we have to admit that most ethical quandaries are trivial, so that being an ethicists doesn't give you any special advantage.
Might be small sample, but that sample is also biased to have a lot of knowledge about what they are preaching (supposedly), meaning they put higher importance about it compared to other things.