ΔE 9.0, close: similar, with a visible difference side by side. Sunny Skin Tone is more saturated than Flame Orange.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Sunny Skin Tone is more saturated than Flame Orange.
The same difference applies the other way round: Flame Orange is 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 Flame Orange on the colour wheel See Sunny Skin Tone on the colour wheel
All matches: Flame Orange equivalents · Sunny Skin Tone equivalents