Luminous Orange vs Lugganath Orange

How close are they?

ΔE 9.7, close: similar, with a visible difference side by side. Lugganath Orange is more muted than Luminous Orange.

Can I use Lugganath Orange instead of Luminous Orange?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Lugganath Orange is more muted than Luminous Orange.

Can I use Luminous Orange instead of Lugganath Orange?

The same difference applies the other way round: Luminous Orange 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.