I like both, but if you want really good mafia stuff go fucking watch The Godfather already. You're not going to get much better than that. Baccano! couldn't hold a candle to it if it tried. 'Real mafia' indeed.

Still comparing Baccano! to Reborn! [wait why do both of them have !] is like comparing apples to oranges. They might both be mafiafruits but they're way different.