ΔE 7.8, close: similar, with a visible difference side by side. Sky Blue is a little darker, more saturated than Corax White.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Sky Blue is a little darker, more saturated than Corax White.
The same difference applies the other way round: Corax White is a little lighter, 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 Corax White on the colour wheel See Sky Blue on the colour wheel
All matches: Corax White equivalents · Sky Blue equivalents