If you look at the history of the meetings between the two teams, indeed Barcelona has better capital because they always win, while Manchester United loses more often when they meet Barcelona.
Of course, I hope that it will be repeated and Barcelona will maintain its record against another record with a win.
but we can't compare with the previous meetings because everything has changed a lot, especially the players and coaches who will make the game different from before. And it will be a very exciting match because both are in top form and also have good results at the end of matches in all competitions, especially at Manchester United.
The record of the previous meeting is actually not too important in the upcoming match, but usually the team that is dominant in winning the match is the one who wins it the most. So I think Barcelona are the favorites in that match based on their head-to-head record, but I don't think Barcelona can be completely relied on in Europe this season after they failed in the Champions League.