ΔE 20.2, loose: different enough that you should pick on purpose. Warlord Purple is a little lighter, warmer than Purple.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Warlord Purple is a little lighter, warmer than Purple.
The same difference applies the other way round: Purple is a little darker, cooler.
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 Purple on the colour wheel See Warlord Purple on the colour wheel
All matches: Purple equivalents · Warlord Purple equivalents