There is no universal rule in designing of compare/contrast essay. Certainly, it should have logical, comprehensive and consistent structure. Remember that the last point is of particular importance, because your reader will judge your essay by it. If, for example, you attempted to prove that the stadium “Universal” is much better than the stadium “Albano” you should wind up by stressing the fact that stadium “Universal” is better, rather than leaving reader with the statement that “Albano” might look better as well. If you think that differences rather than similarities are more important for your essay , you should end up with stressing differences, and vice versa.