ΔE 25.1, loose: different enough that you should pick on purpose. Dusken Green is noticeably darker, much more muted, warmer than Sirenscale Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Dusken Green is noticeably darker, much more muted, warmer than Sirenscale Green.
The same difference applies the other way round: Sirenscale Green is noticeably lighter, much more saturated, cooler.
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 Dusken Green on the colour wheel
All matches: Sirenscale Green equivalents · Dusken Green equivalents