I don't think Marshawn was completely healthy at any time last year. That said, Rawls is quicker and more decisive at picking the "correct" lane to run through. Imaho, his recognition, quickness, and power are what make him so good.
Love that article, thanks for posting it. I especially liked this part:
"The logic?
"The running game enables a team to control the ball, convert short-yardage and goal-line situations, and wear down the opposition."
A lot of it, too, came down to protecting the ball and avoiding turnovers, which is Pete Carroll's top priority as well. "If you throw it 50 times and you throw for 250 yards and you have one touchdown and three interceptions," Osborne said, "you'd have been better off letting the air out of the ball.""