No, Wilkes is not an alternative to PJ (other than in some paranoid posters' heads). He is however a versatile Forward who the coaches likely see as giving us small-ball flexibility (a la Theo).
My concern with Knox is he seems determined to play away from the basket which may steer him elsewhere.
Gary, I agree and disagree at the same time, I agree PJ is more a under sized 4 but from what I have seen of Wilkes, not sure I see him shooting like I would typically see from a wing. I agree, he is more in the Theo mold for a wing but I see him as a kid that can hit the weight room and become a stud at the 4. I don't know that his motor runs as hot as PJs but that is like saying a kids motor does not run like Hansbourgh, it really is not fair to begin with and people don't seem to realize that a motor that runs as strong as that is in itself a talent that few have.
On Knox, ok, so I am just going to say it, I think the kid is making a mistake by putting himself exclusively in to a wing box. I think he is a power forward that dreams of being Durant/Dirk/Lebron/Mello. Same dream Hension had until he woke up and realized, I am what I am, why not be the best I can be