I've noticed (while playing Lusotannans) that the Iberian heavy infantry (lorica scutarii I believe) has 2 points less defensive skill, and 1 point lower melee skill than the medium Iberian infantry - though the heavy infantry makes up for it with 2 points more of armor, but still, that only evens the defense stats, and I think the medium infantry move faster. Is this is stat typo, or was there some reason for the heavies to have that weakness? And if so, what role do they play, if they are slower, but not necessarily stronger than the mediums?