Why are you looking to use either? Generally they're used to treat depression/anxiety without resorting to SSRI's or MAOI inhibitors. I read The Mood Cure, just find it interesting that her other book recommends the use of those supplements as well.
I take 5-HTP at night and it helps me sleep and lowers my rate of depressive episodes. If you're using it to treat depression, you might want to check out "Depression-Free: Naturally" for another perspective on supplements (though she says 5-HTP is dangerous, but it's not an incredibly recent book).