Who is more ruthless, Cao Cao or Song Jiang?

Cao Cao and Song Jiang are more ruthless than Cao Cao, on the grounds that the Xuzhou Massacre, the basic people who can give such orders are villains. The villain's ruthlessness to ginger is called forgetting me, so Cao Cao's ruthlessness is doing everything he can. It's just that Cao Cao is a political figure and has a special person to wash his white clothes.