I think I get what you're getting at, but it's such a hard question to set-up to get that sort of information (especially if you allow location to still be involved, since people will just now pick a school solely on location). Excluding location (well, mostly), here is how I would try to decide (note that these are pretty weak factors, in my opinion--the factors being excluded are the ones that really matter):
If I was interested in biglaw: I would try to find a school that had a big name in the area I was interested in. Maybe it's a practitioner who teaches as an adjunct or maybe it's a tenured professor who's just very well known in a particular area (e.g., Jay Westbrook in Bankruptcy).
If I was interested in DA/PD work: I would look for a school with multiple criminal law clinics and with internship programs during the school year in the city the school is in (location probably matters more for this then, since it would be very helpful to be interning at an office where you want to end up after law school).
If I was interested in academia: I would look for big name professors who have similar research interests.
There's more legal to be added to the list, but this is just what I came up with off the top of my head.
The problem with this analysis? Most law students do not have a very concrete idea about what they want to do after law school, and, even if they do, they don't know much about what they need to do for that career path. And for something like biglaw--sure it would be cool to take a class from David Boies if you're interested in litigation, but it really doesn't matter. Law school is not really preparing you for biglaw, and it's hard to imagine what schools have to differentiate themselves for people who want biglaw when you exclude stuff like job prospects, cost, and location.