ΔE 16.5, loose: different enough that you should pick on purpose. Light Red is a little darker, more muted, cooler than Pyrrole Orange.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Light Red is a little darker, more muted, cooler than Pyrrole Orange.
The same difference applies the other way round: Pyrrole Orange is a little lighter, more saturated, warmer.
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 Pyrrole Orange on the colour wheel See Light Red on the colour wheel
All matches: Pyrrole Orange equivalents · Light Red equivalents