ΔE 9.2, close: similar, with a visible difference side by side. Sky Grey is a little darker, more muted than IJN Gray Mitsubishi.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Sky Grey is a little darker, more muted than IJN Gray Mitsubishi.
The same difference applies the other way round: IJN Gray Mitsubishi is a little lighter, more saturated.
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 IJN Gray Mitsubishi on the colour wheel See Sky Grey on the colour wheel
All matches: IJN Gray Mitsubishi equivalents · Sky Grey equivalents