Hi Arash ,the HD file do look the same . I am referring to the surface (not the edges ) of feathers /perch and specially the head , they do look too smooth . The edges are sharp , but there is not that much sharpness in the surfaces .
Following your DPP 4 guide , which i did because i purchased it , one should set the luminance NR to 5-6 ??!! If you follow your own route as per your guide ....... then you use NR on the bird , right ?
And this is why i have the feeling it is too soft on the surface of the bird and the perch , that is one reason why i stay completely away from luminance NR in DPP 4 ( even if better than older version ) and deal with the noise within PS , but that is my way

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Nothing wrong with it in general Arash , i just look at it maybe from a different perspective about the NR and detail .
Cheers Andreas
BTW the same effect on the HD version , at least to my eyes .
I am looking at the image , on a well calibrated 30" Quato Pro screen
