ΔE 15.1, loose: different enough that you should pick on purpose. Stegadon Scale Green is a little darker, more muted, cooler than Emerald Scream.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Stegadon Scale Green is a little darker, more muted, cooler than Emerald Scream.
The same difference applies the other way round: Emerald Scream is a little lighter, more saturated, 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 Emerald Scream on the colour wheel See Stegadon Scale Green on the colour wheel
All matches: Emerald Scream equivalents · Stegadon Scale Green equivalents