If Chelsea succeed in winning the conference league they will be European champions and if Manchester United fail to win the Europa league then Chelsea will be said to have a better season than United. At the time both sides are struggling to win games and stay consistent however Chelsea are still better than United because of their standing in the league table and until United win the Europa League title Chelsea are better than them.
Chelsea has a good chance to win this season they win this league with hard work and good performance and Manchester United and Chelsea's records are not equal because manchester united is weak if they win this europa league it will be a good win for manchester united Chelsea is the better because Chelsea tend to improve after losing a match and Manchester United have been keeping their list of poor performances for a long time. Manchester United had some chances in which they could have improved themselves but they kept their poor performance bad. Chelsea's performance is better than Manchester United's because they are playing with good performance and hard work.
Chelsea have been much better this season than Manchester United because obviously you can see it from the league table, Manchester United are no where close to Chelsea in terms of quality and performance this season. The only time Manchester United can be said to have a better season over Chelsea is if they win the Europa League title this season but until then Chelsea are having a better season.