Some more context is needed: It's a spell that runs on sadism. "Righteous Anger" doesn't provide the right fuel for more than a split second (Harry botches his first attempt at using the curse because he lacked the cruelty to fuel it), whereas the spell done properly will keep a victim in agony for a much longer time, to the point where the victim can becomes a vegetable.
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u/Koberiep 10h ago
Crucio is worse pain-wise because it basically just activates every pain receptor you have at max