there are many factors to look at when reading those stats, and you can probably get some good info from them, but I would not base your decision solely on the graduation placement rate, especially when SU has nearly 100% of grads employed within 6 months and competitive salary ranges.
I'm currently at SU, and both schools are different in many ways. You should go check out a class or two at both schools, meet with some professors, maybe some admin and see what they have to say about their respective school. Go talk to the students. hang out in the law building. Talk to some attys in the field that you might want to end up in, and see what they have to say about each school.