it was very sad for Barca and Manchester United when they had to meet in the play-offs of the European league this season, they were supposed to meet in the Champions league, but that's how football changes coaches and players in and out of teams resulting in both teams ending up only in this phase, I sure both teams will prove who can go further in the European leagues, but Barca's chances are more open because they are more consistent in the local league compared to MU which is still unstable in the league
It took time for Erik ten Hag to adjust to the Premier League game, it was not easy to build a solid team, especially since the Premier League is the toughest competition, almost all clubs have players who are quite good both physically and in their game performance. If you look at the statistics, the two clubs are very far apart. different, it's true that Barca is more superior but Manchester United's game, can't be underestimated, sometimes they can make the opposing club troublesome, it's true what you say about the game that is still unstable in their league, I think this will be a very exciting match, there will even be extra time in the meeting of these two Clubs..
Truly Erik Ten Hag had made an impact on Man Utd squad since assumption of duties as their new manager, he is gradually repositioning and building the team with time the club will be formidable and stronger, however the fact that Man Utd playing Barcelona in Europa shouldn't be written off as the underdog because of Barcelona topping Laliga that shouldn't be the yardstick to rate them above the Red Devils, both teams are equal to the task and the match can be won by either sides and it's very obvious that EPL fared better in European competitions this season, Liverpool, Man City and Chelsea performed well in UCL while Arsenal and Man Utd also did well in Europa league.
Basically the teams from the English Premier League are strong teams, because the competition in the English Premier League is very difficult. I can admit that if the Premier League team can stay in the top six or at least in the top ten in the Premier League standings, then they can be said to be a strong team if they compete in European tournaments.
So yes, I personally think that although Barcelona are good in La Liga and Manchester United are not the top team in the Premier League table, it seems that their quality at this moment is not much different.
I admit that Erik ten Hag's progress has been quite good, although it will still take time for Manchester United to regain their full form.
But even so, Manchester United look better under Erik ten Hag. So against Barcelona it doesn't mean that Manchester United have lost the chance to win because after all, Erik ten Hag will certainly be able to overcome this obstacle with the ingenuity he has in building the team.
So, these two teams at this moment are still considered to have the same chance, but we don't know what changes will occur after the season break and the transfer market later which may be the chance for both of them to make one of them more dominant to win.