Hi again.
The second screenshot is with textures enabled, the model does not have calculated vertex colors. As the first image shows, in Agisoft it looks very good with textures. In FBX Review texture shaded mode is enabled, see screenshot. See also the screenshot from the folder.
I did some testing with a smaller scale model of the same one. The mesh is created with no vertex colors calclutated, only texture. In FBX Viewer it showed up similary with textures enabled. This is also how the client sees the model since he's using a Autodesk software.
Looks like Agisoft is viewing the model in another way? The FBX Viewer is putting the texture directly on top of the mesh, while Agisoft is kind of interpolating, or smoothing out the surface when enabling textures. Is this only viewable in Agisoft?