ΔE 24.3, loose: different enough that you should pick on purpose. Sick Green is noticeably darker, much more saturated than Goblinoid Green.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Sick Green is noticeably darker, much more saturated than Goblinoid Green.
The same difference applies the other way round: Goblinoid Green is noticeably lighter, much more muted.
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 Goblinoid Green on the colour wheel See Sick Green on the colour wheel
All matches: Goblinoid Green equivalents · Sick Green equivalents