Real Madrid on the other hand has also been doing really great this season both in the UCl and la Liga, they aswell have some good and young talents who are doing so well, so far this two team seem to have good performance enough to bring attention to them, having won several games separately and shown good performance separately, we would want to see how they would perform again themselves just like the case of Arsenal and Manchester city in the premier league, I think that urge to see how well they will both perform against themselves since they are both seen as the two giant of the league, is what fuels the excitement for El clasico.
Realmadrid perform is the most outstanding so far they got good signing that's got brilliant performance, their front three is very good including defence and midfield and that's why they're the current league leaders, they've got better chances of winning the game cause they've got a more complete squad than that of Barcelona however it's the El Classico therefore it's going to be very tough regardless of who wins.