The photo below of a Giant Pacific Octopus was taken on a recent trip to the Seattle Aquarium. The photo was taken on RAW+JPG @ ISO 3200, with the RAW file then developed in Darktable and the JPG file in the GIMP.
Of the two developed files, I think the Darktable version is closer to what the scene looked like. But then again, I don't recall exactly as I spent about as much time watching the Octopus as it took to take that photo. Chasing my highly active and very excited 16 month old son left little time to focus on taking anything more than the passing snapshot. On the other hand, in this case I like how the GIMP edited photo turned out a little better, the slight color differences change the mood and feel of the photo. I also could have explored more of the editing options in Darktable to get a similar look, but this was a fairly straight forward, minimally adjusted image for this comparison.