ΔE 6.2, close: similar, with a visible difference side by side. Deep Rusto is more saturated than Ironclad Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Deep Rusto is more saturated than Ironclad Grey.
The same difference applies the other way round: Ironclad Grey 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 Ironclad Grey on the colour wheel See Deep Rusto on the colour wheel
All matches: Ironclad Grey equivalents · Deep Rusto equivalents