ΔE 23.5, loose: different enough that you should pick on purpose. Mars Orange is a little darker, much more muted than Lava Orange.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Mars Orange is a little darker, much more muted than Lava Orange.
The same difference applies the other way round: Lava Orange is a little lighter, much more saturated.
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 Lava Orange on the colour wheel See Mars Orange on the colour wheel
All matches: Lava Orange equivalents · Mars Orange equivalents