I see one big difference Post. It's speed. Yearby has good lateral agility and burst but his top speed is not on the level of Cook or Sony. Both of these runners are a threat to house it every time they touch it. Yearby seems to be more of the type that will churn out yards and be very good in between the tackles. Not the explosive outside runner who is going to consistently get u chunk yardage/not get chased down in the open field. Honestly ....Yearby is the better compliment to Duke but when Duke leaves it would be nice to have some one in the same mold.