It is not as easy as you are saying it even though Real Madrid has more champions league experience than Arsenal, if you check Real Madrid last two matches you will notice a slack from them and I don't really know what is the course, or will it be the champions league that makes them slack and lose last match. The only hope arsenal have in this season is this champion league and Real Madrid still have hope in the Copa dey Ray they will be playing with Barcelona and so Arsenal will play with all there might to make sure they have a good result so it is going to be a strong one and so lets not jump into conclusion that Real will beat Arsenal.
Currently, both teams seem to be at the same level of performance if we check and judge from their domestic leagues. Arsenal has not been performing so well recently, and despite Real Madrid’s struggles, both teams are not playing badly.What I want to emphasize is that their performances have dropped a little bit recently, but maybe both are saving energy for the Champions League, especially Real Madrid. Even in their last match, nobody expected them to lose to Valencia in the La Liga competition. Nobody expected Real Madrid to drop points, let alone lose the match, especially since it was a home game for them.
As things stand now, I can't confidently say which team is the favorite to win the match based on their recent performances and statistics. However, if I have to judge from experience, I think Real Madrid should be the favorite to win.Let’s see what happens at the end of the game. All I can say is that the match will likely be a very tough one.