These are both awesome af.
Personally ima go for SAO because his lighting and depth are more on point. However the size is a bit of a turn off (though I can understand not wanting to lose all that delicious detail).
Wyvern's is good, but just too plain imo. The bottom is dope, but then the top just disintegrates into plain lines and chunky blocks of color. It's cool for a simplistic design, but the problem is that you have to have something so if you'd just change up the colors a bit and fix the lighting near the top then it'd pop a lot more while remaining simple and elegant. There are so many more pretty and vibrant colors both on the render and complimenting the render.
Edited by Fireclaw, 09 February 2015 - 08:39 PM.