Well, here's an odd one. I have a model with several parts exported as separate .obj files. I model in 'm' (meters) units for real 'mm' in C4D, for convenience. So, each .obj file was imported at 1/10 scale (don't ask why 1/10 worked when it shoulda been 1/1000) to be proportional to the Poser figures. Well, ain't that a kicker! Each part imported (with 10.000 set for the import scale) different sizes wrt each other. Believe me, they are exactly fitting pieces exported without any changes to scale - importing back into C4D properly. Poser is doing some sort of calculation during import, and not one that's conducive to scale-contiguity. No wonder you need DGUs to measure once you've imported.