Took a look at mine and, yeah, the color is off on the plow and horn like in the pic. Not quite as noticeable in-person, as the pic is enlarged significantly, but it's visible. I might paint the plow and horn to match better at some point. Should be easy enough.
Beautiful model otherwise in both the looks and running dept. The yellow on mine is quite a bit more of a darker shade than on my other ATSF locos, including my Kato's, but it still looks good.