ΔE 14.4, fair: the same colour family, but not a straight swap. Leather Brown is much more saturated than Dark Sun Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Leather Brown is much more saturated than Dark Sun Yellow.
The same difference applies the other way round: Dark Sun Yellow is much more muted.
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 Dark Sun Yellow on the colour wheel See Leather Brown on the colour wheel
All matches: Dark Sun Yellow equivalents · Leather Brown equivalents