For some reason I wasnt able to open the first file.
However try to use only VRay materials with VRay. Sometimes maya materials are not working with VRay and gives weird results like that. If you are using VRay I cant see any reason to use Maya materials. It's not too difficult to use VRay basic material. It gives you more accurate results.
So I think it's just that VRay cant handle Maya materials because it's built for VRay materials.