After some looking around, you're right that I'm off, but I'm not way off. The "advanced" portion of the super amoled advanced panel is for increased efficiency versus normal super amoled screens. While thinness is the main reason for using a super amoled screen, Motorola went with the advanced panel versus a regular super amoled panel because it gets the RGBG screen closer to the RGBW in terms of efficiency.
But as for the actual topic at hand, I find the screen on the MAXX to be better in direct sunlight than I did with the screen on the Bionic. And when taken as a percentage of what is using the battery, the screen on the MAXX accounts for less battery drain than the screen on my Bionic did. Perhaps the difference is system tweaks, or maybe I had a Bionic with a screen defect. Either way, the screen on the MAXX is very usable in direct sunlight.