Any PGM90HAM owner?
Are the f-holes plastic inlay or appliqť, or are they painted on before the clearcoat?
I still think the clearcoat probably has a bit of a yellow tint to it. Remember that the f-holes binding on the body are likely under clearcoat, whereas the binding on the neck is not. How does the head binding look compared to the neck binding?
Glen's also right, though... the exposed white plastic knobs and pickup covers/bobbins are a different kind of plastic and are going to react in their own way to light and aging than the other parts of the guitar.
It's still a purty beast, though!