saunders had average sparq for nfl dt while hill was substantially above average.
of course, saunders had substantially above-average performance in college while hill was below average performance, though not horrible.
cowboys predictability chose the talent over the performance as marinelli thinks he can get hill to work hard. lets hope it is true. the game is likely not slowed down for him, his technique is lacking and his strength is not ideal. but those things should happen over time - question is how much time.