ΔE 9.0, close: similar, with a visible difference side by side. Gold Rush is a little lighter, more muted than Gehenna's Gold.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Gold Rush is a little lighter, more muted than Gehenna's Gold.
The same difference applies the other way round: Gehenna's Gold is a little darker, more saturated.
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 Gehenna's Gold on the colour wheel See Gold Rush on the colour wheel
All matches: Gehenna's Gold equivalents · Gold Rush equivalents