ΔE 18.7, loose: different enough that you should pick on purpose. Fire Orange is a little lighter, much more muted, warmer than Molten Lava.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Fire Orange is a little lighter, much more muted, warmer than Molten Lava.
The same difference applies the other way round: Molten Lava is a little darker, much more saturated, cooler.
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 Molten Lava on the colour wheel See Fire Orange on the colour wheel
All matches: Molten Lava equivalents · Fire Orange equivalents