ΔE 6.2, close: similar, with a visible difference side by side. Transparent Yellow is a little lighter than Hoplite Gold. They are different kinds of paint: Army Painter Hoplite Gold is a metallic and Pro Acryl Transparent Yellow 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 6). Transparent Yellow is a little lighter than Hoplite Gold. They are different kinds of paint.
The same difference applies the other way round: Hoplite Gold is a little darker.
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 Hoplite Gold on the colour wheel See Transparent Yellow on the colour wheel
All matches: Hoplite Gold equivalents · Transparent Yellow equivalents