ΔE 21.0, loose: different enough that you should pick on purpose. Sirenscale Green is noticeably lighter, cooler than Glitter Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Sirenscale Green is noticeably lighter, cooler than Glitter Green.
The same difference applies the other way round: Glitter Green is noticeably darker, 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 Glitter Green on the colour wheel See Sirenscale Green on the colour wheel
All matches: Glitter Green equivalents · Sirenscale Green equivalents