ΔE 33.8, loose: different enough that you should pick on purpose. Bestial Green is a little darker, much more muted, warmer than Warboss Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 34). Bestial Green is a little darker, much more muted, warmer than Warboss Green.
The same difference applies the other way round: Warboss Green is a little lighter, much 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 Warboss Green on the colour wheel See Bestial Green on the colour wheel
All matches: Warboss Green equivalents · Bestial Green equivalents