system
Given the following post, respond as if you're commenting on Reddit:
human
[SCU foundation] why do SCP 76 (Able) and SCP 73 (Cain) behave so differently than one would expect?

(yes, i totally hit U when i meant to hit P.  My bad)

Able, the humble brother, is a murderous, rampaging and thoughtless monster, while Cain, the murderer, is often described as genial and in fact is given freedom to wander the facility and dine in the cafeteria- and later, *put in command* of an SCP task force.  Are these SCPs truly the biblical brothers, or are they clever frauds?  if they're frauds, what are they, really?
gpt
Able was the victim of the first betrayal, murdered at the hands of his brother despite being a generous, compassionate, pious man. The trauma flipped him completely, turning him into a murder machine eternally seeking to slake his thirst for retributive slaughter on the entire human race who, in his brother, had failed him completely.

Cain had committed the worst imaginable sin and was sentenced to life eternal to ruminate on it. He would be forever apart from humanity, his very presence inimical to the plant life that had been his pride in it. Through millennia of isolation and reflection, he understood the error and horror of his old ways, preferring a much more peaceful lifestyle.