It's even more exaggerated in the FBI photo, to the point of looking weirdly s-shaped.
But, there is no trace of it on Doorman, whose face matches Oswald's contour to a tee.
What reason is there to think that there is an s-shaped face there on the left? You know there isn't. It's just one more reason to admit that he is Oswald. Denying it now is beyond stubborn. It is really diabolical.