Both are equally well prepared for the exams, both of them paid close attention in class, both did all their homework assignments.
Alex takes out a huge 200 page textbook filled with earmarks and highlights, and frantically tries to flip the book as much as possible.
Ben takes out a small black book and starts going through each tiny page calmly.
10 minutes pass in a flash.
Alex ends up more panicky than before, because he just realised he still unfamiliar with some concepts found in page 41, page 52, page 213+... and who knows where else.
Ben looks even more confident than before.
They proceed to take their exams.
After the exam… the teacher hands them back their results.