For that to be relevant in any way would depend on each manager having the same players at the same time with the same teams in the same league.
I found this "manager ranking" link on a supporter's twitter feed...
I really don't want to defend McLeish because I'm not sold on him whatsoever; though I do think we're stuck with him for a while.
Regarding your comment Johnee, McLeish pretty much does have the same squad in the same league as Houllier minus some key offensive components. (Young, Downing) Looking at this season compared to last year at this point, we've conceded fewer goals and lost fewer games. That surprises me since our defense looks really poor...