Re: Gene Hackman or Kevin Spacey?
Hackman's Lex was a certified criminal genius whose intellect was really one of the strongest weapons anyone could wield against Superman.
Spacey Lex was a caricature of Hackman, recycling plots and stealing info. He was a glorified con man. But as a major bonus he was truly bald.
I gotta go with brains over bald on this one.