not just the shoulder armor bro, there are a few other places where the paint is much more accurate.
compare the hasbro version here:

with the takara version below:
fire deco on pauldron
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separation of color on the upper arm piece
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additional blue color on upper abdominal area and upper thighs
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more accurate grey feet and fists
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smokestacks and upper shoulder piece painted metallic grey
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also i just realised the hasbro version has clear plastic eyes for light piping purpose while the takara version has the eyes painted light blue to be more movie accurate (can be seen in my second comparison pic)