No not exactly they both come from the same source, one leads to a lack of eventual pleasure the other is always pleasurable. It's a difficult subject that requires some real research. Smoking for example only becomes physically aditive after a considerable amount of time, there has been some serious research (I live with someone who did a PhD in it and produced some papers on the subject) That leads to an eventual conclusion that it is physically addictive given the amount of time the brain takes to make it so, it's mainly a social pleasure, if you remove the particular reasons for said drug taking, then even long term abusers can lose the addiction, it's not widely understood, but it is scientifically accepted. You don't become addicted to cigarettes overnight, it is a very long term process, that comes from long term behavioural cueing, i.e it's a learned physical addiction.
Some drugs become physically addictive only because of the way the brain adapts to a long term situation, others simply are because they mimic certain chemicals already present in our brains. But there's a wild, wild world of difference between one drug or another. You need to distinguish between mental and physical addiction, you won't get that unless you take each drug indidvidually.