Metallic Materials

The only difference I see between the two is the environment map which is used.

1: Try to use a background with more details in the "sky"; the gray looks flat, no matter what the reflectivity of the material is.

2: You have a light gray diffuse color in your geometry; darken it a lot, and use the contribution of the reflection map more (like 95%) or so.

3: Use the fresnel formula to calculate the mix between diffuse and reflection. This gives more reflection in the edges, and less in the center (depending on the angle between the view normal and geometry normal)

4: Adjust your specular power up to gain a little sharper highlights.

Use Physically based rendering technique like UDK or Crytek.

The biggest difference I see between metallic surfaces and dielectric surfaces is that metallic surfaces will color the specular highlight, whereas dielectrics won't.

Take a look at a brass doorknob, the reflections are all tinted a brassy color.

So, try multiplying your specular highlights (this includes reflections from the environment map) by the color of your metal.