That misses the point. You only saw the sophomore IW. You have to make an apples to apples comparison, because age and experience matters.
IW was 5 times the player KR was as a sophomore.
Now imagine the stat-line IW would have put up as a 22 year old playing in college still? You don't think he would have been able to rebound the ball at a high level?
IW also a much better defender than KR. Yes, KR gets steals and can cause problems with his length, but he isn't the on-ball menace IW was, again as a sophomore.