There was one thing that they had in common. They had come from humble origins. Doom's ascent from an intensely focused gypsy boy had simply been paved with more violence and blood. Luthor had been able to afford more... subtle means of ascent.
His footsteps clanged to the briefcase, opening it and studying the ore with some curiosity. The computer within his visor started to feed information as a laser scanned over it. Then he picked it up delicately in his gauntlet and started whispering.
It started to hover in his hand, its glow intensifying as it circled slowly. Then Doom snatched it in his palm.
"Quite a different resonance from the green..." He was pleased, but trying not to show it overtly.