Understandable, but Obi is older (drawback) but also there's not much confusion about what position he'll play in the NBA (PF, maybe even small ball 5, whereas Williams was a tweener). Also, after a while, Derrick lost focus of what he needed to do. I honestly think his career coulda been different had he gone to a team willing to develop him and his skills (his 3pt shot btw never materialized). He went to a coach that really wasn't too interested in his personal development (Adelman) and from there teams kinda just viewed him as a finished product.