Joao Felix joined Barcelona from Atletico Madrid on transfer deadline day on a season-long loan deal.
The 23-year-old fell out of favour with Diego Simeone, and has been on exile since then.
Felix had declared openly that Barcelona is his dream club, which has angered the Atletico Madrid fans.
Felix was asked on the difference between Barcelona and Atletico Madrid.
He responded: “As I have said several times, the difference between Barcelona and Atletico can be seen in everything, in the team, the club.
“We can see the way Barcelona play compared to Atletico. It is not bad, but I have adapted better to the way that Barcelona plays. Now I’m happy and it’s the most important thing.
“Barcelona is a big club, everyone knows their way of playing. I’ve adapted very well, but the most difficult thing is to keep this level up.”