I agree OMC. The range of any given color grade must be credited for some of the disparity in hue between stones if the same color grade.
And, definitely, bigger surfaces offer more space to catch and reflect surrounding light. In that light, so to speak, chances are that in a more "controlled" lab environment, it is easier to better see more of the stone's actual hue without distracting environmental reflections – although, any hue/color is created by reflecting and absorbing light energy, soooooooo, can we ever REALLY say what a the ACTUAL color is for ANY particular object? In a different environment, my skin may appear green. *SIGH* I should be a philosopher.
My thoughts were exactly as this. I saw the stones last night on my tablet and finally got to sit down to my computer today (lots of snow here, so we spent time cleaning and playing this morning). As we all know there is a range for an E colored diamond, though it is rather small.
The thing that stood out to me with the larger stone is that it had more colors in it. Not color mind you but many colors. I think that it probably reflects/shows surrounding color more because there is more area and larger facets to show it.
I won't go into the philosophical part of color though... however we must also realize that my perception of color is not that of everyone else's at times. So even within a group of humans we all will see colors ever so slightly differently. Just take those color tests for example. My DH and I did them on the same computer - while he is rather color sensitive, I still blew him away with my perfect score. And of course my father is colorblind and a good friend went to school with someone who only saw in black in white (supposedly at least)
Hey wait maybe I will get into color and how we see it a little after all