ΔE 8.5, close: similar, with a visible difference side by side. Bright Orange is a little darker than Deep Orange.
✓ AK 3rd Generation equivalence chart lists these two as equivalents.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Bright Orange is a little darker than Deep Orange.
The same difference applies the other way round: Deep Orange is a little lighter.
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 Deep Orange on the colour wheel See Bright Orange on the colour wheel
All matches: Deep Orange equivalents · Bright Orange equivalents