ΔE 20.7, loose: different enough that you should pick on purpose. Purple is noticeably lighter, cooler than Banner Red.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Purple is noticeably lighter, cooler than Banner Red.
The same difference applies the other way round: Banner Red is noticeably darker, 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 Banner Red on the colour wheel See Purple on the colour wheel
All matches: Banner Red equivalents · Purple equivalents