DS4 Pro.  (Got it because of Number 1) 

Pros 

1: It is free at the moment. 

2: Figure manipulation is better and the general work screen is more fluid as it uses OpenGL better than Poser.

3: OpenGL rendering for quick pictures and animations.

4: DOF is faster for some reason and easier to setup sometimes.

 

Cons

1: Poser Mat files dont work which sux.

2: No search engine like Posers one.

3: And other general limitations.

 

Poser 9 / Pro 2012 (I have both) 

 

Pros 

1: Renders tend to be better what with IDL / IBL, HDRI (Poser Pro) and AO.

2: Has more content support with materials and such.

3: Dynamics is better in that there are alot of user made Dynamic content (unlike Daz which from what I can gather does not have user made dynamic content as far as I know. 

4: Just more flexability in some areas.

 

Cons

1: Sometimes and awkward interface.

2: IDL and DOF can be really slow depending on the scene.

3: Scene manipulation can be agrovating at times and other general hassles / limitations. 

You know you enjoy 3D Art when you realize that your life is a piece of 3D Art. :)

Core I7 8700K, 32GB, RTX 3060 12G, Windows 10 64bit, Poser 9 / Pro 2012 / Pro 2014, Daz Studio 4.20 Pro