Can is good, but he doesn't have the same composure or nous that henderson does. We became disorganized and disjointed when he went off. Can did well defensively, but Henderson is a better midfielder at the moment.
Composure? Hendo is a nice english lad, but he is only composed when he taps the ball back to who gave it to him, or back to the center backs.
Emre Can is a total footballer who can shield the ball, turn a man, can use both feet, etc etc.
Hendo is lost if he is one-on-one or has to go to the left.