The first video, which can be downloaded here, is a brief jungle fight scene. In this case, DirectX 10 brings volumetric light beams and smoke effects, whereas DirectX 9 is stuck with more pedestrian high-dynamic range lighting and particles. The second video, which is available here, shows a huge mechanized foe—dubbed a "Hunter"—from the game. There, the DirectX 10 code path displays rain as well as very detailed volumetric fire and smoke that actually responds to air currents generated by the machine's loud, foghorn-like "yell". If you'd rather not download the videos, streaming versions are available here and here for the Jungle and Hunter demos, respectively.