Manchester United is aiming at winning the trophy so that they can automatically get a ticket to UCL, and to achieve this goal, United have been performing pretty good in this competition, despite the challenges that they are having in EPL. Tottenham is also in the same shoes with United but United current performance looks more promising to win the league than Tottenham, because Amorin is still building the team, and we might see a sudden change in their performance.
If Tottenham and Manchester United were to play the finals, I think Tottenham will win it as Tottenham has been able to win some games that I thought they'll lose this season. Manchester United aren't focus enough although they have managed to qualify for the knockout stages of the Europa league and they have to know now that anytime that they play badly, they'll be removed from the competition as the knockout stages aren't where you come to play. You'll have to win all your games to keep progressing and I don't think Manchester United have that in them. They're trying to win the Europa League so they can qualify for the champions league but It won't work.