Generally I agree with the comparison, but am a little befuddled as to the reason for doing it. With the exception of 2 minor points in the 4.3 and 4.4 comparisons, I agree.
- 4.3, in the PG portion: APCs are hybrid units. They stack as transport, but may take losses as combat units. This makes them weird with bombardment, but that discussion should go to the PG rules forum.
- 4.4, about the artillery: Artillery batteries should be treated as non-companies. I think APL got sloppy with their symbolism. The problem is that unit size actually matters in IA. The only company size units should be infantry and cavalry, though you could make an argument about transport. With that point becomes the argument sections. If a platoon or company counts as 1 for stacking, does a section count 1? Does the first one stack free like Jay's bazookas?
I think the rules comparison should focus on the 1st and 2nd edition of the rules. While PG references are sometimes useful, IA is a separate game. I do like the 2nd ed. rules better, but there are still some issues.