About a week ago I asked Corey Chavous's scouting service about Klien and Knott. Here is their response...which I find to be accurate for the most part, but I think Knott has the higher ceiling.

DRAFTNASTY ‏@DraftnastyCom @hansenry both players are very active and would probably be considered mid-round players at this point. Klien may have the highest ceiling