I understand someone originally translated the Spanish standard, and it makes sense that the Marraduna color is the same as the Gorria with barring; however, with the cream gene (Ig) diluting the effect of red on top of the barring which also lightens the red, calling the EO hen's neck dark golden red doesn't work very well as a descriptor for what we're aiming for...
For those that do not have a copy of the APA SOP, buff is defined as "a medium shade of orange yellow color with a rich golden cast; not so intense as to show reddish cast, nor so pale as to appear lemon or light yellow."
I think deep, rich or reddish buff would be better descriptors. Just my 2 cents.