ΔE 16.9, loose: different enough that you should pick on purpose. Kabalite Green is noticeably darker, warmer than Emerald.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Kabalite Green is noticeably darker, warmer than Emerald.
The same difference applies the other way round: Emerald is noticeably lighter, cooler.
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 on the colour wheel See Kabalite Green on the colour wheel
All matches: Emerald equivalents · Kabalite Green equivalents