The difference.
Even at 4-1, even 5-1 up against Luton, every City player was still chasing the ball, tackling, defending all over the pitch. Arsenal's players stopped a threw in the towel after Villa's 1st goal.
As did their fans. Their team has been leading in the table since new year, smashing teams along the way. They fall 2 points behind for the first time in ages, and with a whole 10 minutes to go to salvage a point or all 3, at home, they just fuck off? Pathetic