ΔE 8.3, close: similar, with a visible difference side by side. Transparent Naphthol Red Light is more saturated than Legendary Red. They are different kinds of paint: Army Painter Legendary Red is an opaque base/layer paint and Golden Transparent Naphthol Red Light is an ink, glaze or transparent 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 8). Transparent Naphthol Red Light is more saturated than Legendary Red. They are different kinds of paint.
The same difference applies the other way round: Legendary Red is more muted.
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 Legendary Red on the colour wheel See Transparent Naphthol Red Light on the colour wheel
All matches: Legendary Red equivalents · Transparent Naphthol Red Light equivalents