They’re both psychotic, but that’s the only similarity they have. Green Goblin and Joker are considered the equivalents of each other because they were both motivated by evil ambition after one had a accident and the other wanted to become the most powerful gang-lord ever, they both use festive weapons to cause crimes, and they both have maniacal laughs. So, Green Goblin and Joker make more sense as the equivalents of each other, but between the two, I like Joker more as a character. Green Goblin, I love, too. Both of them. Norman and Harry Osborn.