ΔE 13.6, fair: the same colour family, but not a straight swap. Bestial Green is noticeably lighter, cooler than Dark Boot Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Bestial Green is noticeably lighter, cooler than Dark Boot Brown.
The same difference applies the other way round: Dark Boot Brown is noticeably darker, 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 Dark Boot Brown on the colour wheel See Bestial Green on the colour wheel
All matches: Dark Boot Brown equivalents · Bestial Green equivalents