Though I can't achieve the same color with measured data or Copper preset so far.
The rendering times here were the same 11 minutes on my 80-threaded system.
Maxwell's image is a bit clearer from noise, I expected the opposite.
I used BlendLuxCore v2.4 here on the right.
Brushed metal is the subject for further tryouts to make it similar.
Although overall rose gold metal looks the same, but because of lack of some controls I was unable to achieve the identical look.
Some issues were with light materials setup as well. And I figured out that the mask textures for lights have to have gamma set as 1.0 in the image node.
BUT!!! It's pretty close to Maxwell and this is a huge achievement regarding the Maxwell's price tag.
Though, I'll make few other tryouts with custom n,k colors in latest release (and hopefully upcoming Nd, K numeric values in next ones if possible).