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