I haven't run in to too many issues exporting raw obj's from DS... but I do know that weight maps won't transfer properly to Poser cr2, and that any specially purpose-built shaders won't either (I used Iray as an example before). I do know that certain other things don't play well between the two programs (I'd written a tutorial on using Poser items in DS a while back that covered most of what doesn't transfer between the two programs).

The DS fbx import/export has been wonky for ages, sometimes it works and sometimes it doesn't... 3ds import doesn't always work either. I've become very proficient at knowing how to work with DS to make things directly compatible with both programs without needing DSON or special scripts... :)