ΔE 5.5, very close: most people won’t see a difference side by side. Transparent Red is a little darker than Spiritstone Red. They are different kinds of paint: Citadel Spiritstone Red is a technical paint or medium and Pro Acryl Transparent Red is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Yes, for most jobs. Very close match (ΔE 5). Transparent Red is a little darker than Spiritstone Red. They are different kinds of paint.
The same difference applies the other way round: Spiritstone Red is a little lighter.
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 Spiritstone Red on the colour wheel See Transparent Red on the colour wheel
All matches: Spiritstone Red equivalents · Transparent Red equivalents