Part of the same fault that hit Haiti?
Completely different plate, plate boundary, and type of fault. The Plantain Garden Fault that caused the Haiti Earthquake is a Strike-Slip fault caused by motion of the Carribean plate against the North American Plate; it runs from the Dominican Republic to Jamaica.
This earthquake is along the boundary of the Cocos Plate where it is subducting under the North American Plate, along the Mexican Pacific coast.