ΔE 7.9, close: similar, with a visible difference side by side. Green Ink is cooler than Green Tone. They are different kinds of paint: Army Painter Green Tone is a wash/shade and Reaper Green Ink is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Green Ink is cooler than Green Tone. They are different kinds of paint.
The same difference applies the other way round: Green Tone is 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 Green Tone on the colour wheel See Green Ink on the colour wheel
All matches: Green Tone equivalents · Green Ink equivalents