I don't know, the ways in which they stack up is like apples and oranges. Cigarettes are certainly bad for you, and it's known they cause cancer but cigarettes don't have the same severity when it comes to withdrawl in my understanding. Alcohol withdrawl can cause hallucinations, seizures, even death. Also, I would say the danger is greater with alcohol because it impairs your judgement in a far greater way than cigarettes... have you ever been scared of someone who is driving while smoking?

Extrapolated out over time, I would guess that alcoholism is a cofactor in more deaths annually than cigarettes (edit: that is to say, deaths not caused directly by drinking, including drink driving, but conditions such as diabetes and heart disease which are greatly exacerbated by drinking for example... I wonder if someone who dies of cirrhosis gets chalked up as a death by alcohol?)