ΔE 15.6, loose: different enough that you should pick on purpose. NOVA Orange is a little darker, much more saturated than Lugganath Orange.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). NOVA Orange is a little darker, much more saturated than Lugganath Orange.
The same difference applies the other way round: Lugganath Orange is a little lighter, much more muted.
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.
See Lugganath Orange on the colour wheel See NOVA Orange on the colour wheel
All matches: Lugganath Orange equivalents · NOVA Orange equivalents