The mockup is definitely a step up, but the first thing that jumped out at me is the quote button. Black is really not a good choice there. I would use a grey just slightly darker than the post header itself. You want that quote button to blend in. You could even go so far as to take what you have and simply drop the opacity to like 0.3 and have it bump the opacity to 1 when you click it.
One more finer point for improvement, I would use a blue that is a few shades darker than the title bar as the text-shadow color. Using black really stands out here, and I think it cheapens the effect you are trying to achieve.
Ok, final thing. The neogaf logo looks like the white path was overly simplified when you scaled it down. I would export it larger than needed and scale it as a flattened bitmap to avoid the distortions where the white path intersects with the outer edge of the sphere.
One more finer point for improvement, I would use a blue that is a few shades darker than the title bar as the text-shadow color. Using black really stands out here, and I think it cheapens the effect you are trying to achieve.
Ok, final thing. The neogaf logo looks like the white path was overly simplified when you scaled it down. I would export it larger than needed and scale it as a flattened bitmap to avoid the distortions where the white path intersects with the outer edge of the sphere.