First some crits, look here,http://www.artsjournal.com/popcorn/Wall-E%20and%20Eve.jpg
I noticed the threads should be a tad thicker. Also, his eyes are initially black , yet there is some purple glow on his eyes and threads in the second render that look out of place. Hdr map, or reflection? The texture is also off on his head as it isn’t extremely orange around the rim, and your shade of yellow is more like a toy than metal. The neck isn’t supposed to be made of cylinders, but instead are hinges. Last one, the metal panel on his chest too clean, like it was made of new brushed metal. Distribute some grime there too.
That’s all(though it seemed like a lot, I was just stating how close this model and the original are), great job overall though.