[Gatts]

I would say that important fact is that KB (original) had square (or rectangle-like) battle ground, but it was heroes that started with hexagonal battleground.

but on the other hand, even when M&M had very rich monster list, the monster (unit type/level) was very strongly sourced from Kings Bounty (like peasants, archers, pikemen, swordsman... or sprites, ogres... )

Very interesting combination and very succesfull, not a lot of games can say that their names and titles are still known (after nearly 20 years)