ΔE 15.4, loose: different enough that you should pick on purpose. Dark Yellow is a little lighter, warmer than Death Guard Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Dark Yellow is a little lighter, warmer than Death Guard Green.
The same difference applies the other way round: Death Guard Green is a little darker, 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 Death Guard Green on the colour wheel See Dark Yellow on the colour wheel
All matches: Death Guard Green equivalents · Dark Yellow equivalents