It might be hypocritical of me but reacted with "OMGNOES EWEWEW" at the first one and "a bagful of heads of drug-dealers peddling to little kids? AWESOMESAUCE!" to the first. Maybe it has something to do with Damien being a little kid who went and offed a poor ex-con man who was only in prison because he was too afraid of the Bats to get out while Jason was full-grown man who was acting out of his feelings of powerlessness and rage against these scumbags that we each of us has felt at some point in our lives. Killing them was the wrong thing to do, but goddamn if it wasn't satisfying to see, in a base kind of way.
I've always loved Jason but Damien's growing on me, largely thanks to Dini more than Morrison. He'll never be my favourite Robin though.