ΔE 9.8, close: similar, with a visible difference side by side. Turquoise is more saturated, cooler than Green Blue.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Turquoise is more saturated, cooler than Green Blue.
The same difference applies the other way round: Green Blue is 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 Green Blue on the colour wheel See Turquoise on the colour wheel
All matches: Green Blue equivalents · Turquoise equivalents