Ah, I see. I'm not incredibly familiar with the educational systems of other countries, and you never said where you were from. Because you expressed an interest in a national defense, I assumed you were American because that is a subject we are obsessed with.
Moving on to your question, yes, technically smaller is better for class size. However the size differences in your schools are still not significant, and they don't guarantee you'll have better ratio of students to teachers in the classes you'll be taking. Consider looking at the number of students in each law program compared to the number of teaching faculty.
Another thing you might consider is that even if one school has a better ratio of students to professors, the actual caliber of the professors may be lower at one or the other, regardless of the student population. Better faculty matter more than the number of students that they teach. Often times you can judge how good the faculty of an institution is by the faculty's average salary. The best teachers tend to be attracted to where they are paid best. Unfortunately, you are looking at private schools that may not disclose what they pay. You might be able to use your tuition as a rough metric where the school that requires you to pay the most likely pays their teachers the most, but that's making a big assumption. You could also look the amount of grant money he faculty brings in and whether they've published anything of major consequence in the last decade.
As I said last time, your numbers are so insignificantly different that you really shouldn't be making your decision on that factor alone. Your single best determining factor should be the percentage of students that graduate and are actually employees in law from each university. Each school should have that statistic.