ΔE 6.2, close: similar, with a visible difference side by side. Ocean Gray is a little darker, more saturated than Uniform Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Ocean Gray is a little darker, more saturated than Uniform Grey.
The same difference applies the other way round: Uniform Grey is a little lighter, 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 Uniform Grey on the colour wheel See Ocean Gray on the colour wheel
All matches: Uniform Grey equivalents · Ocean Gray equivalents