ΔE 7.1, close: similar, with a visible difference side by side. Tainted Garden is more saturated, cooler than Khaki green No.3.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Tainted Garden is more saturated, cooler than Khaki green No.3.
The same difference applies the other way round: Khaki green No.3 is more muted, 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 Khaki green No.3 on the colour wheel See Tainted Garden on the colour wheel
All matches: Khaki green No.3 equivalents · Tainted Garden equivalents