ΔE 17.6, loose: different enough that you should pick on purpose. Beetle Green is noticeably lighter, more saturated, warmer than Metallic Blue Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Beetle Green is noticeably lighter, more saturated, warmer than Metallic Blue Green.
The same difference applies the other way round: Metallic Blue Green is noticeably darker, more muted, 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 Metallic Blue Green on the colour wheel See Beetle Green on the colour wheel
All matches: Metallic Blue Green equivalents · Beetle Green equivalents