ΔE 15.2, loose: different enough that you should pick on purpose. Emerald Forest is noticeably darker, cooler than Slime Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Emerald Forest is noticeably darker, cooler than Slime Green.
The same difference applies the other way round: Slime Green is noticeably lighter, 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 Slime Green on the colour wheel See Emerald Forest on the colour wheel
All matches: Slime Green equivalents · Emerald Forest equivalents