ΔE 19.2, loose: different enough that you should pick on purpose. Transparent Quinacridone Red is noticeably lighter, more saturated, cooler than Blood Thorn. They are different kinds of paint: Army Painter Blood Thorn is an opaque base/layer paint and Golden Transparent Quinacridone Red is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Transparent Quinacridone Red is noticeably lighter, more saturated, cooler than Blood Thorn. They are different kinds of paint.
The same difference applies the other way round: Blood Thorn is noticeably darker, 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 Blood Thorn on the colour wheel See Transparent Quinacridone Red on the colour wheel
All matches: Blood Thorn equivalents · Transparent Quinacridone Red equivalents