So the Commander's Edition is essentially the BattleMech Manuel for AS?
It's visually similar, but includes everything to run 'Mechs, vehicles, infantry, battle armor, protomechs, conventional fighters, aerospace fighters, dropships, support vehicles, and mobile structures, plus a bunch of optional rules and advanced terrain types, then three chapters on how to build a force, how to give that force special abilities, and basic scenarios. So not really, no, but it's a good book.