Rifle Brown vs Blackened Brown

How close are they?

ΔE 8.8, close: similar, with a visible difference side by side. Blackened Brown is a little darker, more saturated than Rifle Brown.

Can I use Blackened Brown instead of Rifle Brown?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Blackened Brown is a little darker, more saturated than Rifle Brown.

Can I use Rifle Brown instead of Blackened Brown?

The same difference applies the other way round: Rifle Brown 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.