ΔE 8.5, close: similar, with a visible difference side by side. Light Turquoise is more saturated than Shadow Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Light Turquoise is more saturated than Shadow Grey.
The same difference applies the other way round: Shadow 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 Shadow Grey on the colour wheel See Light Turquoise on the colour wheel
All matches: Shadow Grey equivalents · Light Turquoise equivalents