ΔE 16.1, loose: different enough that you should pick on purpose. Dark Green Kawanishi is noticeably darker, more muted, warmer than Stegadon Scale Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Dark Green Kawanishi is noticeably darker, more muted, warmer than Stegadon Scale Green.
The same difference applies the other way round: Stegadon Scale Green is noticeably lighter, 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 Stegadon Scale Green on the colour wheel See Dark Green Kawanishi on the colour wheel
All matches: Stegadon Scale Green equivalents · Dark Green Kawanishi equivalents