ΔE 11.3, fair: the same colour family, but not a straight swap. Mournfang Brown is a little darker, cooler than Sunburst Ochre.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Mournfang Brown is a little darker, cooler than Sunburst Ochre.
The same difference applies the other way round: Sunburst Ochre is a little lighter, warmer.
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 Sunburst Ochre on the colour wheel See Mournfang Brown on the colour wheel
All matches: Sunburst Ochre equivalents · Mournfang Brown equivalents