Thanks, George, these are super helpful.
One observation for folks looking at the two whites: The solid white lighting angle is just a tiny bit different -- you can see that the car is casting a little bit more of a shadow at the rear, while the pearl looks like it was closer to direct ahead/overhead. So, the highlights are a bit muted on the side of the solid white car, and I don't think that's all because of the paint. (The pearl probably does highlight a bit more, though.)
The same is true on the green -- the side towards the camera is a little bit in shadow, so it doesn't show the same highlights as some of the other colors.
No criticism intended here -- just pointing out a subtle difference that could influence perception if somebody isn't aware of it.