The Kirov is better. The kIROV IS BETTER ARMORED MORE able to destroy bases EDIT: The Kirov Airship, as the first paragraph tells, has more armour but is butt-numbingly slow, both when moving on the battlefield and when it's being trained. It does have the ability to switch between propeller power and Gastroburner, which increases speed but damages the Kirov. It is also expensive, but that is because of its awesome destructive power. The Century Bomber moves faster but is easier to be shot down by enemies. It also must keep going back to the Airbase to reload its bombs. The Century are sturdy, but the Kirov will drive your enemies insane with the amount of punishment they can take. unfortunately, Kirovs are expensive.