ΔE 8.9, close: similar, with a visible difference side by side. Gorgon Brown is a little darker, warmer than Fired Clay.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Gorgon Brown is a little darker, warmer than Fired Clay.
The same difference applies the other way round: Fired Clay is a little lighter, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Fired Clay on the colour wheel See Gorgon Brown on the colour wheel
All matches: Fired Clay equivalents · Gorgon Brown equivalents