ΔE 21.6, loose: different enough that you should pick on purpose. Warlord Purple is a little lighter, much more saturated, cooler than Crimson Red.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Warlord Purple is a little lighter, much more saturated, cooler than Crimson Red.
The same difference applies the other way round: Crimson Red is a little darker, much 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 Crimson Red on the colour wheel See Warlord Purple on the colour wheel
All matches: Crimson Red equivalents · Warlord Purple equivalents