tuxounet wrote:
What I don’t understand is why there is such a difference (the SOOC JPEG looks very dull and poorly representative of reality, whereas the RAW‑derived JPEGs are much closer). I know each program applies its own conversion, but why such a discrepancy?
You shouldn't be surprised.
Let's start with a simple fact that a camera itself has absolutely nothing to do with color. If you look into what's stored inside a RAW file, you'll see nothing resembling the reality. A color is created entirely in software, i.e. the maker of a RAW converter decides what color they want. The SOOC JPEG is just an output of a RAW converter running inside the camera because it's also a computer.
Next, let's look at "representative of reality". That is never the design goal. Every single RAW converter deviates from realism on purpose because the real world is dull and boring. At the minimum the contrast and saturation are boosted. But on top of that some colors are enhanced (usually two cmplimentary ones) while others are suppressed. What colors? Well... that's why I mentioned the software people above. It's their choice, and they usually offer different outcomes to you in a form of camera profiles.
Here you have it. Different teams behind different RAW converters defined different colors to their linking.
P.S. If you want "representative of reality", some cameras have a "faithful" or "neutral" profile. They aim to be closer to reality, but Sony's "faithful" is still fairy cartoonish. For reproduction work or for product photography people often make their own profiles. Ironically, true-to-life color profile is the easiest profile to make: just snap a color target at a known light temperature, feed the resulting RAW to a profiler, and you're done. It will look like shit, BTW, and not going to be useful outside of repro. That's why nobody cares about being "representative of reality". Consumers don't want that.