Wasteland Soil vs Permanent Maroon

How close are they?

ΔE 22.3, loose: different enough that you should pick on purpose. Permanent Maroon is noticeably darker, warmer than Wasteland Soil.

Can I use Permanent Maroon instead of Wasteland Soil?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Permanent Maroon is noticeably darker, warmer than Wasteland Soil.

Can I use Wasteland Soil instead of Permanent Maroon?

The same difference applies the other way round: Wasteland Soil is noticeably lighter, cooler.

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.