^This
Everyone accepted the color difference because they weren't comparing "apples to apples" (pun intended). But now that almost everything between the full size and the mini are supposed to be identical (including the fact they both have "Retina" now), everyone expected them to look the same.
I think it boils down to, if the small sized iPhone 5/5S uses the higher gamut, and the big sized iPad 4/Air uses the higher gamut, and they are all Retina, why doesn't the medium sized iPad Mini with Retina use the same? That's my question about the difference.