Light Leather vs Thondia Brown

How close are they?

ΔE 8.6, close: similar, with a visible difference side by side. Thondia Brown is a little darker, warmer than Light Leather.

Can I use Thondia Brown instead of Light Leather?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Thondia Brown is a little darker, warmer than Light Leather.

Can I use Light Leather instead of Thondia Brown?

The same difference applies the other way round: Light Leather is a little 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.