I don't know anything about the rankings, but I visited both a few weeks ago.
I went in preferring SFAI. I'm not sure why now, but I changed my mind. Part of it was that the faculty I met at SFAI Seemed pretty... I dunno... tired and unenthused, while the opposite was true of those I met at CCA. The other thing is that the facilities at CCA were about a hundred times better. Multiple wood shops, CNC routers, vacuformers, non-cramped studio spaces, large outdoor working areas, etc. SFAI's main building was pretty cool, though a labyrinth, and the grad facilities were way out in Dogpatch... a not great (though not bad) neighborhood that I had trouble getting to. That building was pretty bleak with grad students like sardines and sharing space with ad agencies. CCA's main building, on the other hand is an old train station (Greyhound station?) that's a giant glass tube full of daylight, gallery space, and work area. All of the facilities are in the same area, which was easier for me to get to than either of the SFAI campuses.
Though I didn't go into it that way, and I didn't get in, CCA became my first choice. I'm a painter.