ΔE 8.3, close: similar, with a visible difference side by side. Monastic Green is a little darker, more saturated than Gunner Camo.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Monastic Green is a little darker, more saturated than Gunner Camo.
The same difference applies the other way round: Gunner Camo is a little lighter, more muted.
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 Gunner Camo on the colour wheel See Monastic Green on the colour wheel
All matches: Gunner Camo equivalents · Monastic Green equivalents