IMO, Walker is a good combination of both. He can run on you and pass. Kid is a true leader only for a sophmore. I think he will be better than both before its all said and done. He does not get rattled easy. He has thrown over 2,000 yds and around 25 tds. Rushed for over 300.
Ijames is the best runner, he loves laying the wood. But they also mix it up between a couple other backs. Walker will take off every now and then also.
Ijames also has made the switch to LB and has played great. You will also see Holland at CB if Trigg decides to pass....both are ball hawks and Ijames loves to hit.