Brainmatter Beige vs White Grey

How close are they?

ΔE 7.8, close: similar, with a visible difference side by side. White Grey is a little darker, more saturated than Brainmatter Beige.

Can I use White Grey instead of Brainmatter Beige?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). White Grey is a little darker, more saturated than Brainmatter Beige.

Can I use Brainmatter Beige instead of White Grey?

The same difference applies the other way round: Brainmatter Beige 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.