the trouble is: you create a scene in Poser, save it as a Poser file, and you can then open that in Daz Studio, Vue, Cinema 4d (via interposer) etc.

You create a scene in Daz Studio, save as a Daz file, you can't use that for anything else. Sure, you can export as obj/fbx, but in reality thats not very practical. Now, this is not the fault of Daz, necessarily, but it limits the programs usefulness. Someone should write a "save scene as PRZ" plugin or something.

While we're on the subject, the cost was mentioned. While you can DL Studio, grab some freebees from here and make some renders, if you want to get into it properly you need the extra plugins, especially ones like pwSurface. And by the time you've bought all the plugins, you could practically buy Poser. So erm.. yeah. I love studio, don't get me wrong, the renderer is fast and good, its UI is 100% better than Poser, but they seriously need to invest in plugin creation (esp dynamic clothes/hair, and the "save for Poser" I mentioned)

just my 2c