Well, it's a $50,000 tuition difference. If all else is equal, then obviously the cheaper school is the better option. If I were you, I'd scour threads on SDN for each of those two schools, and also call the admissions office of each school and ask if there is a current student there you could talk to on the phone. I'd have a list of questions/concerns ready to ask them. Or, if you can't get ahold of anyone that way, perhaps PM one or two students that go to those schools who post in pre-allo or their school's allopathic class thread and who sound like they wouldn't mind answering some questions about their school. Also, I think that geography can be a big part of this choice too. I'm assuming you're from CA. If so, start thinking of anyone you can that lives in or has lived in one of those cities. Check out the location, cost of living and if you can see yourself there. Did you have any particular gut feelings when you interviewed? There must be some differences between the schools you already know about (curriculum, facilities, clinical/research focus, etc.). If you haven't done so already, make up a list of pros and cons for each school. That should definitely help.
For what it's worth, I can't imagine the "ranking" difference you mentioned above will be a big deal. Or rather, if you are from CA and want to return for residency, perhaps ask for match lists from each of the schools (as well as step 1 scores), and/or ask if CA students that attend their schools have much luck matching back in CA (I've heard it's pretty hard regardless). Maybe one school does have more name recognition or connections than the other. But even if that's the case, if you do well in classes and on the boards, it probably doesn't matter which one you go to. Ah, another thing to keep in mind is to ask how many "away" rotations you can do at each school. Some schools let you do many away rotations so that you have a better chance of matching back home. Other more regional schools may only allow you to do three one-month rotations away from the school.