Sorry, ! didn't mean that you did or did not use JPEGs.I'm not sure I understand you. If it's about in cam jpegs; I've never done these.
In the Quattro, are there settings for in-camera JPEGs like "vivid", "standard", etc? Are you able to go to each setting and adjust it to your liking? When you open a new Quattro X3F in SPP are the SPP adjustment sliders all zero? If the sliders are not at zero, do you leave them alone or do you set them all to zero and start from there?
The only point I was really trying to make is that the Quattro might, at as-new default settings, apply more saturation and contrast than some would like when first opening in SPP.