The research focuses on the problem of Argentine-Brazilian relations, which has acquired a new meaning due to ideological contradictions between Jair Bolsonaro and Alberto Fernandez. Innovative idea of the work is to present a number of conceptual features of the Argentine-Brazilian dialogue in recent history and compare with them the last episode of inter-leader confrontation. Although the logic of asymmetric interdependence between Argentina and Brazil still remains, for the first time in the history of the strategic partnership, the governments of the two countries look totally differently at economic and political issues, regional and global affairs at once.