OBJ file is different from actual sim? - body, face paramet.

I've never ripped a sim but I found a big thread here, and there are quite a lot of Google results here.

NinjaRipper instructions here
MTS Simripper tool here
Found a SimRipper tutorial here
Another SimRipper tutorial

What I'm reading is that if you export as a .dae file it will include the rig and bone assignments (This is what the SimRipper tool at MTS states).

Also, apparently, people with Nvidia graphics cards have trouble preserving what the CAS sliders have done, and people with Intel cards have better luck. There's some discussion here about that with a possible solution or two. The discussion is a couple of years old, however, so it's possible Nvidia may have corrected the problem since then.

Re: the SimRipper tool, the tutorial states to export both an .obj and a .dae. There's an issue with the normals and you can transfer the normals information from the .obj to the .dae using the data transfer modifier. Then you can delete the .obj. Alternatively, you could transfer the bone assignments from the .dae to the .obj. then delete the .dae (keep the rig, either way).