ΔE 12.6, fair: the same colour family, but not a straight swap. Mustard Yellow is more saturated, cooler than Balor Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Mustard Yellow is more saturated, cooler than Balor Brown.
The same difference applies the other way round: Balor Brown is more muted, 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 Balor Brown on the colour wheel See Mustard Yellow on the colour wheel
All matches: Balor Brown equivalents · Mustard Yellow equivalents