ΔE 9.2, close: similar, with a visible difference side by side. Andrea Blue is a little darker, more saturated, cooler than Medium Blue.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Andrea Blue is a little darker, more saturated, cooler than Medium Blue.
The same difference applies the other way round: Medium Blue is a little lighter, more muted, warmer.
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 Medium Blue on the colour wheel See Andrea Blue on the colour wheel
All matches: Medium Blue equivalents · Andrea Blue equivalents