In terms of motivation and confidence, of course Barcelona is much better, but on the other hand Atletico Madrid also has strong motivation, they also want to win the title this season and the most likely is the Copa Del Rey because they are already in the semifinals so in terms of motivation I think Barcelona and Atletico Madrid are the same.
And it must also be admitted that Barcelona this season has had quite a significant improvement compared to last season after making many changes and especially the arrival of Hansi Flick as Barcelona coach has been quite successful in making this team even better.
Both are trying to do their best, especially for Atletico Madrid because this is an option that still has a chance compared to the La Liga title. But the problem is Barcelona is in much better condition so beating them is a little more difficult. Drawing in the first leg and Barcelona managed to make a comeback is proof of how difficult it is for Atletico Madrid to beat them.
Barcelona has indeed improved this season compared to last season and they will try to do their best to get the title. Atletico Madrid must really focus if they want to beat Barcelona because if they play like the first leg it will actually make them lose their chance.