Krunch, what do you take me for..? some computer illiterate idiot?
Well, do you really want me to answer that?
DX10 is crap, as well as DX9 and DX11, it's too bad OpenGL got forgotten so fast, just like 1997... The truth is that you don't want to think outside the box. If you can't distinguish real from fake then my explanations are for nothing. Just look at those pictures you linked. You should know that no matter what you use, models can't get a higher quality if you run them with different software. It's pretty dumb to believe that, really. It's not like the software anticipates what the creators wanted the model to look at a higher quality and just render it.
That's what most people do, they think that if it's newer it's better. Bull****. As much as DX11 can perform now, OpenGL could perform years ago. Even though it's not about OpenGL, DirectX will always try to knock on first, by using FUD(fear, uncertainty, and doubt) and also it's intelligent marketing campaign, which makes many gamers(like you) that the newer the DirectX version, the better the graphics. It's really sad...