Eric had a look at this one for me a little bit ago. (FYI: the meshes are labeled opposite to what they actually are)
This appears to be an issue with the FBX exporter from MODO in this case and may need to be reported with them.
The vertex color information is not being saved correctly with MODO to the one with multiple UVs. When I import this file in Max and when Eric imported into Maya it doesn’t have any information. The single UV one has the painted vertex information present.
Apologies for the delay.