ΔE 19.6, loose: different enough that you should pick on purpose. Eldritch is a little lighter, much more saturated, warmer than Stegadon Scale Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Eldritch is a little lighter, much more saturated, warmer than Stegadon Scale Green.
The same difference applies the other way round: Stegadon Scale Green is a little darker, much 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 Stegadon Scale Green on the colour wheel See Eldritch on the colour wheel
All matches: Stegadon Scale Green equivalents · Eldritch equivalents