It seems that you had a different difficulty level in the first and second playthroughs. Or the first summary of Vittorio's army is from a different version of the map. The initial army of AI heroes depends, among other things, on the difficulty level.

As far as I remember, a flexible script with logistics simply cannot exist within the capabilities of the game's scripting language. It can only be done this way.

There was one difficulty level – the hero. The second time, my army was much smaller than the first time. The first time, I had 350 assassins, about 30 sorceresses, 80 minotaurs, or 120, I don't remember exactly. 87 riders, 20 hydras, and 11 dragons, 600 dark knights, and 80 faceless (I was carrying troops in 2 heroes). And the second time, when the blue hero appeared, I had 12 giants, 120 assassins, 16 sorceresses, and 350 black knights, 20 hydras, and 35 minotaurs. That's why I say that something is not right. The second time, there were no resources on the map to buy troops in the Dungeon, and the heroes were 2.5 times stronger. It's strange in general.