I did a image taken in almost total darkness with my 5D MK III at ISO 51200. I was actually checking its ability to autofocus in low light, so I had my 50mm f/1.4 on it.
I processed the images in DXO, using the prime NR but no other adjustments, in DPP with adjustments to NR & sharpening, and in Lightroom with adjustments to NR and Sharpening and clarity.
I tried to get the test as readable as possible while maintaining and detail in the red shield on the left.
I went in and checked just now, its red and not magenta or purple. There is gold inside a black scroll on the shield, the gold is totally lost at this high ISO.
DXO did the best at retaining any detail in the shield and was the only software to show it the correct color. DXO also showed the image the darkest, so it looks dull.
Finally, I cropped the image to just the shield and some text so it could be viewed at about 1:1.
I was surprised and pleased that DXO was able to render the color correctly, and keep lots of detail, better than my efforts with LR and DPP.
I'm pretty well convinced.
I am wondering why it took DXO well over a minute to save the file as a full sized jpeg when LR does it in 10 sec or less.
I imported the rendered jpg images from DPP and DXO Pro 9 into Lightroom merely to upload them to smugmug. I did not change anything, and they look the same to me.