Bud,there is one color of white SA dial,white.
It can have a subtle hue under low lighting conditions,but there is not different shades on any SA,it is milk white under normal lighting and all the same.
I don't have pictures off hand to show the differences but this is how it goes.
There is White- which is the one with kind of a dull, kind of off white look.
There is also Hurricane white- This is the more dynamic brighter white. Some people describe it as almost having a silverish hue to it.
Believe me, even a lot of people on the Breitling forums do not realize this till they end up buying one. Then they see the other shade in a picture or wrist and start posting about seeing a fake. Quite comical.
This only applies to the Super Avenger, as far as I know.
Well as you can probaly see from my pics, that's not the case with the one I have.
If you look at the Breitling website , you can build your own Super Avenger. It gives you a choice of a White dial, or a Hurricane white.
I completely understand the effect you are talking about. I've seen the comparison pics on the GEN Forums.