ΔE 9.6, close: similar, with a visible difference side by side. Kobold Grey is a little darker, more saturated than Combat Fatigues.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Kobold Grey is a little darker, more saturated than Combat Fatigues.
The same difference applies the other way round: Combat Fatigues 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 Combat Fatigues on the colour wheel See Kobold Grey on the colour wheel
All matches: Combat Fatigues equivalents · Kobold Grey equivalents