 Aside from the sporting and east-west rivalry, the two clubs have different team-building philosophies.Frankfurt, prefers buying local and foreign players, while Potsdam, focuses on the development of young players within its own club-system.The defection of Petra Wimbersky and Karolin Thomas from Potsdam to Frankfurt inflamed the rivalry, as the two clubs had abided by an unwritten agreement not to poach each other's players without first consulting the German Football Association.