I suspect it all depends on the mood of the scripter when he coded the AI of each one. I can just picture them kabitzing about it while "talking shop" at the end of the day.
Dev 1- I scripted 2 gargoyles in the _____ fight to target the nearest divine caster with a hold spell with a DC of 85... (giggles)
Dev 2- yeah remember that odd goblin we added to the ________ fight? Well get this - I scripted the little bastard to go invisible and sneak up on the lowest AC arcane caster and tie his shoelaces together resulting in a -6 AC drop just before he sticks him with the gobby blade of amnesia that wipes any memorized spells clean and then replaces whatever he resets the slots for with random choices the next time he rests. (gulps a beer) I'm not sure it will sneak by to the final version tho...
dev 3 - snores...
