ΔE 9.7, close: similar, with a visible difference side by side. Sons of Horus Green is a little darker, more muted than Wizards Orb.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Sons of Horus Green is a little darker, more muted than Wizards Orb.
The same difference applies the other way round: Wizards Orb is a little lighter, more saturated.
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 Wizards Orb on the colour wheel See Sons of Horus Green on the colour wheel
All matches: Wizards Orb equivalents · Sons of Horus Green equivalents