They're very different. Paxil has a very short half life, Prozac
a longer one, so it's an easier drug to
take and to
quit, but whether it will work as well can only be answered by trying it. But quitting Paxil can be difficult; lowering the dosage has already put you into withdrawal, it sounds like. You must go slowly. Now, personally, I'd try and lose the weight somehow, though I gained 50 pounds on Paxil, too, and couldn't lose it no way no how.