Comparative advantages case
According to Discovering the World through Debate, a "comparative advantages case" is "A method used for developing a case about policies that advocates the adoption of the plan based on its advantages compared with the status quo or some other policy" (247).
Trapp, Robert, et al. Discovering the World through Debate: A Practical Guide to Educational Debate for Debaters, Coaches, and Judges. Third Edition. New York: IDEA Press Books, 2005.