If you only look at goals scored/goals conceded you could also argue that United have the best defence in the PL since they have only conceded 20 goals. Then you watch their games and you realize that without De Gea they would have conceded 40.
Still waiting for your stats that show Barca create "better chances" than most teams. If you can't show me I'll stick to my stats since they are the most accurate to describe the attacking ability of a team even if they count long range shots.
Poor comparison as that goals stats would be used to show that Man Utd are one of toughest to score against and that includes the GK.
Goals scored is far more relevant in judging the attack of a team than attempts during a game.
Unless think likes of Malaga who have scored 16 times have better attack than likes of Atletico.... should be fine on Sunday then.
Can wait all you like wont be getting them. Find them for yourself if it bothers you all that much and your conclusions have been drawn already anyway.
As I said your stats show Arsenal better than Barca going forward. Fool proof. Good idea to stick to those.