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