As we all know they both fought Nate. Nate was in the best shape of ufc career against MJ, and in the worst shape of his career against Conor. They both won the first round against Nate, although i think Conor dominated the first round against Nate more than Mj. Conor really didn't get hit by an awful lot of hard shots by Nate but got finished, while Mj ate a lot of hard 1-2's and didn't get rocked once. Mj has the edge in his wrestling, speed, kicks, cardio and clinch game. Conor has the edge in his power/accuracy, footwork, boxing(left hand) and his reach. I think Mj would eventually tire Conor out by his wrestling, just by striking with him at his high pace or by clinching him and winning an UD or late finish. Ofcourse Conor could always land that lethal left hand and tko him.