His Airness, no question.
LBJ stronger than MJ, but MJ would definitely find a way to counter that.
After all, MJ survived Oakley, Rodman, Laimbeer, Mahorn, Ewing, etc - all of that extremely bruising and physical play from his time.
How would LeBron stand up to the physicality allowed in MJ's time? That would be interesting, to say the least.
But yeah MJ would find a way to beat LeBron.