According to what I read recently. When the clothes are constructed the morphs added to the clothes have to have exact same name as the body morphs or they won't work properly when you try and magnetize. 

"Further, conformingadapting clothing to the morphed figures is, of course, problematic.  I've got Cross Dresser and noticed that I get these knife-edged jaggies when I convert and pose.  Is this normal for Studio, and V4 as well as other models?"

I don't have cross dresser but suspect it has more to do with something going not quite perfect with there.  V4 is grouped a bit differently than the other Mil figures and so joints don't conform 100% to the others. Usually if your seeing jaggies on a bend then the joint parameters are not quite right. 

And to be blunt the V4 model has some issues herself. if you move her arms some ways for posing even with limits on the mesh will break and there are other places where the bends will not behave smoothly. Top of her thigh flattens and one of her arms gets an unseemly bump. And then there is v4.1 who makes the clothes go crazy and break and has her eyebrow area jump off her face when I zero the figure. Her I just don't even deal with.

Overall Daz and Poser handle meshes and the way they bend identically. Poser will "smooth" edges and make objects look rounder and the abstract concept of standard size is different but generally those are things a average user won't ever notice or deal with.  

Figure Pose files work basically the same in both Daz and Poser. All they really are is a set of mathematical coordinates that tell the program where in "space" to place body parts and how much they need to be rotated in that space. I have not been brave enough to upgrade to 1.8 yet (and because I do merchant files and i want them to  be more backward compatible rather than less I may not till something is to shiny to resist) so I haven't heard anything about it not being able to translate poses files properly.  Some mat pose files and figures or objects that come in with a texture attached do work differently from poser by the way. So checking the bump, displacement and specularity for those isn't a bad idea if they don't look quite right after an initial render.

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