Loyola's said "25 lines" of text, which I interpreted as 25 lines in MS Word. Pasting that much text into the online form works just fine. RFU's gives you one page of lines and tells you not to exceed the space provided.
RFU doesn't have a limit. As I described above, it's a single box on a single page in which you can type/write your essay. They merely say, "Please use the space provided below and do not attach additional pages."