ΔE 13.5, fair: the same colour family, but not a straight swap. Dark Beige is much more muted than Golfag Brown.
Can I use Dark Beige instead of Golfag Brown?
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Dark Beige is much more muted than Golfag Brown.
Can I use Golfag Brown instead of Dark Beige?
The same difference applies the other way round: Golfag Brown is much 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.