Baneblade Brown vs Gun Corps Brown

How close are they?

ΔE 16.6, loose: different enough that you should pick on purpose. Gun Corps Brown is noticeably darker, more saturated, cooler than Baneblade Brown.

Can I use Gun Corps Brown instead of Baneblade Brown?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Gun Corps Brown is noticeably darker, more saturated, cooler than Baneblade Brown.

Can I use Baneblade Brown instead of Gun Corps Brown?

The same difference applies the other way round: Baneblade Brown is noticeably lighter, more muted, warmer.

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.