ΔE 26.0, loose: different enough that you should pick on purpose. Basilisk Green is noticeably darker, much more muted, cooler than Dark Angels Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Basilisk Green is noticeably darker, much more muted, cooler than Dark Angels Green.
The same difference applies the other way round: Dark Angels Green is noticeably lighter, much more saturated, 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 Dark Angels Green on the colour wheel See Basilisk Green on the colour wheel
All matches: Dark Angels Green equivalents · Basilisk Green equivalents