@warblersrule rule is exactly right. I went to law school and am on my LS’s board of advisors. In the old days, the school’s perception of your undergrad institution mattered a lot. Today, it barely registers. GPA/LSAT score. I have a ton of colleagues and lawyers who work with my company who attended directional state schools, hammered it there, and went on to Harvard, Northwestern, Yale and similar LSs.
As between UCB and JH, to the extent the undergrad school ID is factored in even a little, there will be no difference between these two. I don’t guarantee much, but I’ll guarantee that.