| 133-A | 133-B | 133-C |
Oswald's left shoulder appears to be further back in space relative to the chest-midline in the 133-B picture than in the 122-A picture. This accounts for the difference in the shoulder width.
I also believe the morph...
... has the 133-B head a bit smaller than the 133-A head, which would in turn make the left shoulder more narrow to the camera. Not saying the animation sizing was intentional, but there's an amount of subjectivity that could induce error. Since the shadow-cast on the facial features in the two photos vary (due to head tilt), the width of the head might be a more accurate thing to align.
Hi Jerry, yes of course you are right and the original head ratios are indeed different. The wide-angle effect makes Oswald's head in 133-A stretch vertically as compared to the more centered head in 133-B thus exposing Trojan's gif. Btw imo this alone makes any image manipulation virtually impossible because not only do you have to match Oswald's lighting you have to match his position within the frame to allow for the appropriate image distortion.
JohnM