EGIE Well I am not offended.
Here is the thing, we check and double checked that we do everything right. The data is based of photogrammetry data for physically based rendering. Unless the company that create the data made a mistake (implausible), the person that stepped into the photogrammetry rig almost certainly had that skin color.
Same lighting, different materials, different (auto) exposure settings. Many "fake problems" can be attributed to the auto exposure / auto contrast doing weird things, especially when reflecting unnaturally reflective surfaces, like the perfect white material you get in SketchUp by default.