ΔE 16.3, loose: different enough that you should pick on purpose. Love Affair is a little darker, more saturated, cooler than Bright Red.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Love Affair is a little darker, more saturated, cooler than Bright Red.
The same difference applies the other way round: Bright Red is a little lighter, more muted, 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 Bright Red on the colour wheel See Love Affair on the colour wheel
All matches: Bright Red equivalents · Love Affair equivalents