If it is open to the public look at the career pages for both university and see what companies are coming or have come in the past for recruitment. These are the companies that are either 1) actively recruiting because of status or 2) have former graduates that are looking to recruit. Both of these help. If OSU has very few (I doubt it) vs. CMU then CMU is a good bet. Also if you are thinking of PhD in the future then getting published should be something to strive for (getting an RA position could help with that) so the school that will let you work in a lab might help more in the future.
I don't know much about OSU but I doubt highly it is lowly ranked enough to be particularly harmful to your future.
I don't know much about OSU but I doubt highly it is lowly ranked enough to be particularly harmful to your future.