ΔE 6.8, close: similar, with a visible difference side by side. Death Guard Green is a little lighter than Gremlin Green.
✓ Army Painter Fanatic conversion chart lists these two as equivalents.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Death Guard Green is a little lighter than Gremlin Green.
The same difference applies the other way round: Gremlin Green is a little darker.
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 Gremlin Green on the colour wheel See Death Guard Green on the colour wheel
All matches: Gremlin Green equivalents · Death Guard Green equivalents