El Clasico will determine who win the league between these two teams. If Madrid wins, they have given themselves more hope to win the league. if Barcelona wins, automatically they have won the title. However, if it ends in a draw, Barcelona still maintains their stand. It will be very annoying if Barcelona allow Madrid to defend the title this season, because they have the chance of winning the league currently.
Twice has they met (Barcelona and Real Madrid) this season. Still Barcelona always takes the victory. IMO, if the El Clasico match will determine who wins the league pr now when they meet soon then we all know who goes home with the cup.
Barcelona will surely win Real Madrid again. I am not sure Madrid can be able to face Barcelona and get any point from the game. Looking at the past performance and current performance, Barcelona looks more promising to win.