Now, as to your last question.......

There is no way one can directly compare Vue poseable meshes against those of Poser or Daz Studio.

This is because it all depends on the individual model-builder. And this is true for Poser and for Daz Studio as well.

Essentially, you must judge the value of a model by looking first at the overall quality of the mesh, and then by looking at the skeleton to see if it makes sense for the kind of poses you will want to create.

You can see the quality of the mesh, most of the time, in the promotional pictures. If the mesh looks over-simplified, or is not photo-real, it might not make a good purchase for you.

Unfortunately, you cannot see the skeleton in Poser, nor in Daz Studio, although human-figure Poser models can be assumed to have a pretty good skeleton. It is not clear to me how a potential purchaser could evaluate a skeleton for an animal or another kind of non-humanoid object for Poser or Daz Studio. I suppose one must simply acquire some experience with different model-builders and then stick to those who turn out good products.

For Vue, at least at Rendo and Cornucopia3d, we are not yet accustomed to displaying the skeleton in the promo pictures. But, I think this will become standard practice in the future. And, even we vendors of poseable Vue models need to develop some further experience. My sperm whales are much better than the bottlenose dolphin I placed in the C3D Store earlier, so I'll be updating that dolphin. (Purchasers of a model at C3D get any updates automatically and for no charge.)

And, there is also the issue of materials. For Poser and Daz Studio, textures and materials applied to those models are "optomized" for the Poser and DS rendering engines. Poseable Vue models have materials and textures made specifically for the Vue rendering engines - you don't have to translate these, down-size them, or whatever, as you do when you import a Poser or DS model into Vue. So, if you decide to acquire a Vue poseable model, everything is already made for you, and you're "good to go!"