Heres the Durant CK, I tried Cliff Robinson, Mike Wilks, LeBron James, Devean George, Carlos Boozer, Josh Howard and Vince Carter headshapes, and Vince looked best.
I still need to fix a few things, fix the slight overlap on the eyes, make the lips smaller, lower the hairline slightly and fix the chin a bit.
^ I like version one better, the headshape looks better. Try Vince Carters headshape also
Heres the final Kevin Durant, I made slight changes on the second screen, what looks better?
I had no luck making the chin look less broad (its the headshape that does it) and I don't think decreasing the lip size did anything other than stretch the image more to fit the headshape.