Anbesol: RAW is Different than JPG. JPG is limited to 256 values per color, a 12 bit RAW is 4096 values per color Even if the camera does a linear transfer function to 8 bit the file is losing color information, 3840 shades per color, dynamic range. The is why n8 was able to get a very usable edited photo with out noise or JPG artifacts.
As part of the JPG compression shades of color are merged to save file space, losing color information and detail in the compression.