Plato ni Nietzsche

Nietzsche brings up Plato several times, especially when he discussed Christianity. It was really interesting that Nietzsche kept mentioning Platonic ideals of morality and faith. I'm confused as to whether or not Nietzsche was comparing "Socratism" to Christianity... it seems like he's obviously making some sort of comparison, but I don't know if he's saying they're really different or if he's saying that there is something very similar between them. I want to know whether or not he's saying that faith has the same implications for Plato and Christianity.