ΔE 9.4, close: similar, with a visible difference side by side. Gryph-Charger Grey is a little lighter, more muted, warmer than Runic Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Gryph-Charger Grey is a little lighter, more muted, warmer than Runic Grey.
The same difference applies the other way round: Runic Grey is a little darker, more saturated, cooler.
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 Runic Grey on the colour wheel See Gryph-Charger Grey on the colour wheel
All matches: Runic Grey equivalents · Gryph-Charger Grey equivalents