This is a subtlety that I'm no expert on. "Height", except for quarterbacks who have to see over the linemen instantly, usually doesn't translate into better football play in and of itself. For the guys who are engaged in combat, whether mano-a-mano or in a fight to catch or deflect a ball, it is extension of the arm levers which makes the difference, rather than how far into the air the top of your head is. [almost no tackling nor pass deflecting takes place with the top of your head].
So what does this have to do with Michael? Well, I don't know, but in the films and in a couple of pictures I've seen of him standing, his arm length looks pretty good to me [hanging about two-thirds of the way down the thigh to the knees.] Now this is too tough to assess with the pictures, but if it's true, then his "extension" could be that of a guy 6'3" or so [this is a thing I look at because that is how my 6'0" frame is built, with the wingspan of a 6'3" guy; very valuable as a "surprise" in basketball].
I will be happy to be informed differently on this, and also happy to be educated on other reasons why the actual height of the eyeballs difference between 6'1" and 6'3" is significant. But I thought that this was worth mentioning as IE always makes "bad assumptions" on this simple top-of-the-head measuring stick rather than wondering about the actual extension --- which we're almost never told, and I wish we were.