Both teams have both won trophies this season, although not the same trophy and Manchester United really deserves to get the FA Cup trophy for this season. Likewise, Manchester City is also more deserving of the Premier League trophy this season thanks to the strength they have built so far so that both of them are equally worthy of bringing home a trophy that is in accordance with the abilities they have this season. And yes, congratulations to Manchester United for successfully winning the FA Cup trophy this season.
If Manchester city had played in their true form, they would most definitely going to win that game even with two goals down because this isn't the tough Manchester united that would literally be a problem to Manchester city , so it was very much expected Manchester city would win but it's really a good one both team have got some thing they would go back home with at the end of the season as this was the only chance for Manchester united at a trophy which has actually turned out their best experience this season. Manchester united now have an opportunity to play at the Europa next season by virtue of this trophy they won today, this was a dual win for them as they weren't having hopes of qualifying for the Europa next season.
If Manchester united had lost this game they would ave ended up without a trophy and not have to be able to participate in any other league game next season except for the premier league of which it would have been the first time in a long while Manchester united get into such position as they have usually made it to the champions league or Europa almost every season a d not ending the season without getting to qualify for any of these.