ΔE 18.6, loose: different enough that you should pick on purpose. Agent Orange is a little darker, cooler than Orange Magma.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Agent Orange is a little darker, cooler than Orange Magma.
The same difference applies the other way round: Orange Magma 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 Orange Magma on the colour wheel See Agent Orange on the colour wheel
All matches: Orange Magma equivalents · Agent Orange equivalents