The 2005 build looks much better: just look at the lighting, textures and the facial hair. I own the game, and he doesn't look anywhere good as that.
"Game-wise, it's pretty close to the original vision: you sneak into the battlefield and can choose whether to do a stealth game or interfere with the battle more directly. But the graphic, side things like motion-blending and the size of the map, totally was not accomplished to my original vision - to my satisfaction.
When we first showed the game engine at TGS, the staff were really proud and happy. PS3 was a dream machine, y'know, and we were going to work on this and that - and we had so many ideas. But when we actually started developing the game, we realized there were a lot of restrictions and so it turned out how you see it today. The original vision was to go ten steps further, the reality was just one step, which isn't to say we didn't progress."
http://kotaku.com/381412/kojima-disappointed-with-metal-gear-solid-4
