Crusted Sore vs Indian Shadow

How close are they?

ΔE 9.0, close: similar, with a visible difference side by side. Indian Shadow is a little lighter, more muted than Crusted Sore.

Can I use Indian Shadow instead of Crusted Sore?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Indian Shadow is a little lighter, more muted than Crusted Sore.

Can I use Crusted Sore instead of Indian Shadow?

The same difference applies the other way round: Crusted Sore is a little darker, more saturated.

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.