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