ΔE 7.1, close: similar, with a visible difference side by side. Stained Ivory is a little lighter, more muted than Basilisk Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Stained Ivory is a little lighter, more muted than Basilisk Brown.
The same difference applies the other way round: Basilisk Brown 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 Basilisk Brown on the colour wheel See Stained Ivory on the colour wheel
All matches: Basilisk Brown equivalents · Stained Ivory equivalents