ΔE 17.5, loose: different enough that you should pick on purpose. Vulkan Green is a little darker, much more muted, cooler than Savage Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Vulkan Green is a little darker, much more muted, cooler than Savage Green.
The same difference applies the other way round: Savage Green is a little lighter, 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 Savage Green on the colour wheel See Vulkan Green on the colour wheel
All matches: Savage Green equivalents · Vulkan Green equivalents