ΔE 8.9, close: similar, with a visible difference side by side. Violet Red is more muted, warmer than Druchii Violet. They are different kinds of paint: Citadel Druchii Violet is a wash/shade and Reaper Violet Red is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Violet Red is more muted, warmer than Druchii Violet. They are different kinds of paint.
The same difference applies the other way round: Druchii Violet is more saturated, 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 Druchii Violet on the colour wheel See Violet Red on the colour wheel
All matches: Druchii Violet equivalents · Violet Red equivalents