Lelouch may have killed way more people than Suzaku, there is a revolutionary movement going on. Lives are going to be sacrificed for the sake of freedom. History is a very good example of this.
Suzaku, OTOH, is way more of a cold blooded sonuvabitch than Lelouch, because he is willing to SACRIFICE his OWN FAMILY and FRIENDS for his own selfish reasons. He's still the worst kind of hypocrite.
His people are being enslaved and the only thing he can think of is killing Zero, his best friend. Killing his best friend isn't going to help anybody, but himself and the his people's oppressors. Good job Suzaku.
Just thinking about Suzaku's nonsense makes me RAGE.