ΔE 19.2, loose: different enough that you should pick on purpose. Saffron Sunset is noticeably lighter, cooler than Fuegan Orange. They are different kinds of paint: Citadel Fuegan Orange is a wash/shade and Reaper Saffron Sunset is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Saffron Sunset is noticeably lighter, cooler than Fuegan Orange. They are different kinds of paint.
The same difference applies the other way round: Fuegan Orange is noticeably darker, warmer.
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 Fuegan Orange on the colour wheel See Saffron Sunset on the colour wheel
All matches: Fuegan Orange equivalents · Saffron Sunset equivalents