ΔE 7.6, close: similar, with a visible difference side by side. IJN Deep Dark Green is a little darker, more muted, cooler than Traitor Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). IJN Deep Dark Green is a little darker, more muted, cooler than Traitor Green.
The same difference applies the other way round: Traitor Green is a little lighter, 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 Traitor Green on the colour wheel See IJN Deep Dark Green on the colour wheel
All matches: Traitor Green equivalents · IJN Deep Dark Green equivalents