Right, you don't want to forget about the difference in oiling.
As far as any diff. in steam holes there aren't any with the EQ heads. I read their was a difference and ordered a set of the high dollar Cometic gaskets for mine because they claim they are specially made for magnum style heads (I have EQ's) and when I got them I compared them to a set of Fel-Pro 1008 gaskets and the holes are exactly the same.
