Battle of Yellow Tavern vs Yriel Yellow

How close are they?

ΔE 6.7, close: similar, with a visible difference side by side. Yriel Yellow is more muted than Battle of Yellow Tavern.

Can I use Yriel Yellow instead of Battle of Yellow Tavern?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Yriel Yellow is more muted than Battle of Yellow Tavern.

Can I use Battle of Yellow Tavern instead of Yriel Yellow?

The same difference applies the other way round: Battle of Yellow Tavern is more saturated.

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.