Goblin Green vs Mortarion Green Clear

How close are they?

ΔE 8.2, close: similar, with a visible difference side by side. Mortarion Green Clear is more muted than Goblin Green.

Can I use Mortarion Green Clear instead of Goblin Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Mortarion Green Clear is more muted than Goblin Green.

Can I use Goblin Green instead of Mortarion Green Clear?

The same difference applies the other way round: Goblin Green is 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.