When it comes to Barcelona, the favorite does not change according to the audience. Because Barcelona played very good matches away. Right now, we think that a difficult match awaits them in Italy, but maybe they will leave the field victorious by playing a new game, influenced by the fans. If Inter plays like they did in Spain, they may have a chance. Otherwise, Barcelona has a higher chance of advancing.
Barcelona has won a quote good number of away matches and as much as I want to see Barcelona goes to the final, we are under estimating the power of Inter, that team pen game and reality hit harder and they seem to be ahead of Barcelona in this round of today matches but their is still time. It's too early to make conclusions but Inter is given me everything I want to see in Barcelona in this match, they are very well organized and compose.
If Inter is able to win this match and probably Arsenal was able to make it on the other side, it would be great to see who is going to win the Champions League but I fear what is happening to Barcelona right now will be happening to Arsenal too by the time they meet PSG, they have leverage Arsenal home by 1 goal and now it's their turn to feast on Arsenal unless they are able to perform the regular Real Madrid magic is doesn't happen when you expect it.
I also agree that Arsenal's chances are low. Paris Saint-Germain will be playing at home and they won the first leg 1-0. That's why it's not right to compare them to Inter. Also, Inter scored a goal right now and they took the advantage again with Martinez's goal. They are playing well in Barcelona right now and the crowd is motivating the team very well. If they play in a similar way until the end of the match, they can score a few more goals against Barcelona who are panicking. I think the most exciting match of the Champions League is being played right now.