They are both excellent and, perhaps more importantly, they are both different. It would be better for the student to look at the differences with a goal of selecting the institution that best meets their needs. The obvious advantage in larger law schools are a greater number of course offerings and diversified interests within the faculty, while in small law schools there is probably greater contact with the faculty and the other law students. This is a tricky area today because many law schools tend to be more national as a result of the job market. Also, many law schools have a combination of two or three of these characteristics.
Any professional program is competitive.
Some law schools are very competitive and have student bodies which are vocationally oriented and grade conscious. Some students react very well to a very competitive atmosphere while others do their best work and feel more comfortable in a supportive atmosphere. In my opinion, the best way to find out about the student body of a law school is to visit the school and talk to both the faculty and the students. If possible, sit in on a few classes and mix with the law students after the class. Correspond with former undergraduates from your institution who are attending a particular law school.