... Iíve also heard other working professionals claim that you just canít get Nikon files to look like Canon and vice versa...
And both are galaxies away from the Leica "look" (which can only be approached, but only remotely so, by the Zeiss "look" - sarcasm alert
). Well, if you are in that school of thought (or shall I say "school of belief", because thinking has very little to do with it), I am afraid there is no one here who could really help you.
We are going in circles here.
You keep insisting there is such a thing as "Nikon golden/brown" color. So far two people on this forum told you it ain't so. Now, I like to think of myself as a guy who knows a thing or two about a thing or two, but forget about me, Jeff Schewe is the
expert. We also keep telling you that your insistence on SOOC "proofs" is misguided, as any SOOC jpeg is a result of several parameters and numerous possible combinations that can impact color (contrast, saturation, tint, white balance, exposure).
... If anyone would like to comment on that, as to whether or not custom camera profiles might help achieve the look Iím after, Iíd be most grateful.
You see, it is quite possible to achieve "the look you are after", but it ain't "Nikon golden/brown look". It would be a specific look achievable by any camera on the market, most likely the key component of which would be a Cloudy or Shade white balance.
But again, do not trust me. Let's see what your hero (Nessa, the photographer whose examples you posted) has to say on that subject:
I take photos with the white balance incredibly... too too warm
You can see from the SOOC image that my exposure was off
I don't want you to think that the secret to nice photos is in the post processing. Good lighting, styling, and watching your backgrounds will get you everywhere.
Now, isn't that all what Jeff and I have been telling you? Has Nessa credited Nikon for her colors?
Once again, do not trust "experts" or even experts. Do it yourself, grab a Nikon buddy, set both cameras to default settings and the same white balance and see for yourself whether you would get images that much different (there will be some difference, of course, as each manufacturer would have slightly different default parameters, and certain lenses might transmit slightly warmer colors than others, but those differences are nowhere near the look you are after).