ΔE 15.7, loose: different enough that you should pick on purpose. Parasite Brown is a little darker, much more muted than Solar Flare.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Parasite Brown is a little darker, much more muted than Solar Flare.
The same difference applies the other way round: Solar Flare 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 Solar Flare on the colour wheel See Parasite Brown on the colour wheel
All matches: Solar Flare equivalents · Parasite Brown equivalents