I'm going to speculate that he would have achieved about the same - but probably been less fun along the way.Yes I meant the magnitude, but to the last point, thats the point of this conversation, we'll never know what we would have done under Potter in the Europa League. But based on the evidence I don't believe we would have, his approach was far more pragmatic.
Potter's Albion on form controlled games better than RDZ's and were less susceptible to being broken on.
In that same group we'd still have won both Ajax games, because they were pretty poor. We might well have beaten AEK in the first game, as well. So, I'm confident we'd still have got through the group - perhaps not won it.
If we'd faced Roma in the next round, we'd still have lost - because they were better than us.