ΔE 16.1, loose: different enough that you should pick on purpose. Mars Yellow is noticeably lighter, more saturated than Sunburst Ochre.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Mars Yellow is noticeably lighter, more saturated than Sunburst Ochre.
The same difference applies the other way round: Sunburst Ochre is noticeably darker, 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 Sunburst Ochre on the colour wheel See Mars Yellow on the colour wheel
All matches: Sunburst Ochre equivalents · Mars Yellow equivalents