British Uniform vs Zandri Dust

How close are they?

ΔE 15.4, loose: different enough that you should pick on purpose. Zandri Dust is a little lighter, much more muted than British Uniform.

Can I use Zandri Dust instead of British Uniform?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Zandri Dust is a little lighter, much more muted than British Uniform.

Can I use British Uniform instead of Zandri Dust?

The same difference applies the other way round: British Uniform is a little darker, much 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.