In a fight? Green Goblin wins easily. A more interesting question is Oscorp vs. Lexcorp in a technology-building contest. Or if they wanted to assassinate each other, who would succeed?
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Stark Enterprises would whip both of them at tech development....... but as we don't have that option here GG in a fight and i'm not sure (cos i don't read too much DC) but LL in tech but maybe Norman in regular business