ΔE 11.5, fair: the same colour family, but not a straight swap. Sons of Horus Green is more saturated than Evergreen Fog.
✓ Army Painter Fanatic conversion chart lists these two as equivalents.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Sons of Horus Green is more saturated than Evergreen Fog.
The same difference applies the other way round: Evergreen Fog is 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 Evergreen Fog on the colour wheel See Sons of Horus Green on the colour wheel
All matches: Evergreen Fog equivalents · Sons of Horus Green equivalents