Worring about it before delivery could be a case of putting the Cart before the Horse.
I agree with post #22. All along I thought It could mostly be the lighting.
Note how the wall's temperature (color) changes from left to right and top to bottom.
Yes, there might be differences due to the way it was painted by the factory (piece by piece) and the lighting could be enhancing it.
Also, I think polishing compound (not rubbing compound) is a better choice than a magic eraser.
It's pretty mild and it's made to bring out shine so there's less chances to dull a surface.
I have a lot of vixens, they're not yellow. Even my 1970s Vixen 60L is whiter than my FL80s or FL102s, which both matches with my tak FC60 white. Taks are white to me.