ΔE 15.3, loose: different enough that you should pick on purpose. Pyrrole Orange is a little lighter, more saturated than Molten Lava.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Pyrrole Orange is a little lighter, more saturated than Molten Lava.
The same difference applies the other way round: Molten Lava is a little 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 Molten Lava on the colour wheel See Pyrrole Orange on the colour wheel
All matches: Molten Lava equivalents · Pyrrole Orange equivalents