ΔE 10.2, fair: the same colour family, but not a straight swap. Beetle Green is more muted than Sirenscale Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Beetle Green is more muted than Sirenscale Green.
The same difference applies the other way round: Sirenscale Green is 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 Sirenscale Green on the colour wheel See Beetle Green on the colour wheel
All matches: Sirenscale Green equivalents · Beetle Green equivalents