There is some canned ATC that is played in the background and a rudimentry ATC system that I have never used. As for AI aircraft, you can have a few of them out there but it doesn't compare to MSFS in that department.

MSFS gives a superior overall 'pilot experience'. Where X-Plane still excels is in flight modelling and fluidity of cockpit instrumentation. Both have their strengths and weaknesses. It all depends on what you are trying to achieve with your sim time I guess.