ΔE 7.9, close: similar, with a visible difference side by side. IDF Sinai Grey is a little darker than Dark Ghost Gray.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). IDF Sinai Grey is a little darker than Dark Ghost Gray.
The same difference applies the other way round: Dark Ghost Gray is a little lighter.
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 Dark Ghost Gray on the colour wheel See IDF Sinai Grey on the colour wheel
All matches: Dark Ghost Gray equivalents · IDF Sinai Grey equivalents