John Marshall to Kent. I'm in the top 10% of my class, but it's still JM.
I think if everything is working for you at JM why transfer. I really think rankings are irrelevant particularly from Kent to John Marshall I don't think saying you went to either school is going to drop any jaws not that they are bad schools, but it is not like saying you go to Harvard or something and I would have no idea that Kent was ranked higher than John Marshall living in California and I imagine the majority of people wouldn't know the difference. I really realized how irrelevant the rankings are when I started my internship yesterday. I was working with a bunch of people from Hastings, some guy went to Pitt, one went to Florida Coastal, and just a bunch of schools some ranked why higher than the others, but at the end of they day it was all of our first days and the U.S. News ranking of anybody's school did not matter at all. I also compare this rankings to my study group in law school. I went to Chico State a no name school and another guy went to some 7th Adventist school in Tennessee. The other 4 people in my group 2 went to Notre Dame and 2 went to Berkley, clearly excellent undergrads, but me and the guy from Tennessee were on the Dean's list and the other 4 got 2.8-2.6 all were in the middle of the curve. Moral of the story is it doesn't really matter the name of your school it is the results you get that count. If you are in the top 10% of John Marshall then why change unless location is a factor.
I wouldn't say there's a big advantage to transferring since it doesn't seem like one school is far superior to the other, though I'm not that familiar with the market.