Sertraline has dopamine reuptake inhibition activity that prozac doesn't have, people I've spoken to who've tried sertraline told me they found it quite stimulating compared to other SSRI's like escitalopram.
SSRI's aren't all identical in the kind of activity they have in the body, seretonin reuptake inhibition is just the most significant activity going on. Paroxetine (seroxat) for example has a small effect on dopamine and noradrenaline transporters aswell as the main effect on seretonin reuptake. I guess this is part of the reason why people quite often have to try a few different SSRI's before they find one which suits them best.
SSRI's aren't all identical in the kind of activity they have in the body, seretonin reuptake inhibition is just the most significant activity going on. Paroxetine (seroxat) for example has a small effect on dopamine and noradrenaline transporters aswell as the main effect on seretonin reuptake. I guess this is part of the reason why people quite often have to try a few different SSRI's before they find one which suits them best.