ΔE 20.4, loose: different enough that you should pick on purpose. Wyvern Green is much more muted, cooler than Caliban Green.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Wyvern Green is much more muted, cooler than Caliban Green.
The same difference applies the other way round: Caliban Green is much 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 Caliban Green on the colour wheel See Wyvern Green on the colour wheel
All matches: Caliban Green equivalents · Wyvern Green equivalents