No, there is no difference really between the two. No matter what method or approach utilized, the outcome is to gain a alteration of neurotransmittors (or neuroceptors) that affects the chemical reaction and brain waves that affects one's interpretation, thought process, feelings, and experience. The main factor that leads to addiction is the imbalance between one's core vital needs, thus seeking another realm or area to compensate, usually in a unhealthy manner, to gain unmet needs and seek closure among underdeveloped stages thru means of that addiction. There may be a different process and experience between the both physiological and psychological, but both the objective and means to a subconscious end is usually the same.