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