I totally agree with you True Lee. I have seen the same.
When I was in the showroom, I was sold for Polar Silver. It was like... WOOOOW. buuuut, the same car was outside as a test car for customers, and when I saw it in real daylight I was like... what color is that???? The salesman said it was polar silver. I went back inside and was extremely disappointed! Than.... I saw the cirrus white one with night package (black mirrors, black rear windows, panorama roof and the 18" black AMG rims). That was also a wooooow impact. However also that car was outside as a test car the salesman said. I went to look at it and indeed, it still contained the magic look. Indeed, even if the weather is cloudy.
That is when I had decided to chose for white, and I am happy I did ;D