ΔE 9.1, close: similar, with a visible difference side by side. Steel Grey is more saturated than IJN Gray Mitsubishi.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Steel Grey is more saturated than IJN Gray Mitsubishi.
The same difference applies the other way round: IJN Gray Mitsubishi is more muted.
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 Steel Grey on the colour wheel
All matches: IJN Gray Mitsubishi equivalents · Steel Grey equivalents