ΔE 8.7, close: similar, with a visible difference side by side. Turquoise is a little lighter, more saturated, cooler than Payne’s Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Turquoise is a little lighter, more saturated, cooler than Payne’s Grey.
The same difference applies the other way round: Payne’s Grey is a little darker, 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 Payne’s Grey on the colour wheel See Turquoise on the colour wheel
All matches: Payne’s Grey equivalents · Turquoise equivalents