ΔE 33.6, loose: different enough that you should pick on purpose. Dark Emerald is noticeably darker, much more muted, warmer than Emerald Metallic Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 34). Dark Emerald is noticeably darker, much more muted, warmer than Emerald Metallic Green.
The same difference applies the other way round: Emerald Metallic Green is noticeably lighter, much more saturated, 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 Metallic Green on the colour wheel See Dark Emerald on the colour wheel
All matches: Emerald Metallic Green equivalents · Dark Emerald equivalents