ΔE 8.8, close: similar, with a visible difference side by side. Warm Brown is a little darker, more muted than Kawa Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Warm Brown is a little darker, more muted than Kawa Brown.
The same difference applies the other way round: Kawa Brown is a little lighter, 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 Kawa Brown on the colour wheel See Warm Brown on the colour wheel
All matches: Kawa Brown equivalents · Warm Brown equivalents