@Teyon - I find I have to disable AO in Painter if I've baked it as it's applied in the viewport shader. The other thing (I am speculating but I think it could be relevant) is that real time rendering is straight to monitor which will be sRGB while Poser renders using a different gamma curve that isn't as contrasty. If you pop the Poser render into an editor and add a bit of contrast with a Curves adjustment, I think you should find that the result then matches the real time displays. So your original roughness export may be correct ;)

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