About outdoor viewing, it depends. The Rezound is LCD, brighter than my RAZR, and yet my RAZR is better for outdoor viewing. Viewing angles is better on my RAZR, and that helps with outdoor viewing when trying to avoid sunlight. The Rezound screen is also too reflective, like a mirror. That kills it for outdoor viewing. I cant remember if I liked my DX1 better vs my RAZR for outdoor viewing. And yea my DX1 was also brighter than my RAZR. And I dont think my DX1 was reflective like my Rezound. My Rezound is literally like a mirror.
Some extra things goes into what makes these screens good/bad for outdoor viewing, power saving, etc. Like black backgrounds are supposed to save power for Amoled screens.