ΔE 15.6, loose: different enough that you should pick on purpose. Abaddon Black is noticeably darker, more muted than LAF Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Abaddon Black is noticeably darker, more muted than LAF Green.
The same difference applies the other way round: LAF Green is noticeably lighter, 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 LAF Green on the colour wheel See Abaddon Black on the colour wheel
All matches: LAF Green equivalents · Abaddon Black equivalents