Bleached Strap Grey vs Chocolate Brown

How close are they?

ΔE 7.9, close: similar, with a visible difference side by side. Chocolate Brown is more saturated than Bleached Strap Grey.

Can I use Chocolate Brown instead of Bleached Strap Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Chocolate Brown is more saturated than Bleached Strap Grey.

Can I use Bleached Strap Grey instead of Chocolate Brown?

The same difference applies the other way round: Bleached Strap Grey 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.