ΔE 8.1, close: similar, with a visible difference side by side. Red Brown is a little lighter, more muted than Hobgrot Hide.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Red Brown is a little lighter, more muted than Hobgrot Hide.
The same difference applies the other way round: Hobgrot Hide 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 Hobgrot Hide on the colour wheel See Red Brown on the colour wheel
All matches: Hobgrot Hide equivalents · Red Brown equivalents