Hi,
I did not include starters less than a liter either (in the recommended column) as they don't accomplish much when you are pitching a typical 100 billion cell pack. However some people working with slants want the ability to work with small quantities, which I'm going to look at in the future.
I have not done a direct comparison with Mr Malty - most of the equations I derived from the new Yeast book that Chris White and Jamil did. However, one obvious difference might be where you set the cutoff for starter growth limit (mine is 3.0). This basically determines how large a starter can get before you give up and toss another packet of yeast in. If this is too large you end up with the starter being almost as big as your beer.
Brad