ΔE 6.1, close: similar, with a visible difference side by side. IJN Hull Color/Sasebo is a little darker than Uniform Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). IJN Hull Color/Sasebo is a little darker than Uniform Grey.
The same difference applies the other way round: Uniform Grey 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 Uniform Grey on the colour wheel See IJN Hull Color/Sasebo on the colour wheel
All matches: Uniform Grey equivalents · IJN Hull Color/Sasebo equivalents