ΔE 15.7, loose: different enough that you should pick on purpose. T'au Light Ochre is a little darker, cooler than Flame Orange.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). T'au Light Ochre is a little darker, cooler than Flame Orange.
The same difference applies the other way round: Flame Orange is a little lighter, 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 Flame Orange on the colour wheel See T'au Light Ochre on the colour wheel
All matches: Flame Orange equivalents · T'au Light Ochre equivalents