ΔE 8.8, close: similar, with a visible difference side by side. Deep Rusto is more muted than Terrestrial Titan.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Deep Rusto is more muted than Terrestrial Titan.
The same difference applies the other way round: Terrestrial Titan is 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 Terrestrial Titan on the colour wheel See Deep Rusto on the colour wheel
All matches: Terrestrial Titan equivalents · Deep Rusto equivalents