Rioli is a forwardline little pest and the only thing he has going for him is speed, Hill on the other hand is younger than Rioli, twice as strong even for a 2nd year player, can take HUGE marks, kick goals out of his arse (like rioli) can kick goals from OUTSIDE of 50 metres from few steps, has unbelievable pace, height and endurance and i could just go on and on and on...
Hill also has much superior disposal to Rioli, who can be incredibly erratic especially when kicking to a leading foward.