ΔE 14.6, fair: the same colour family, but not a straight swap. Dusken Green is more saturated, warmer than Pearl Green. They are different kinds of paint: Tamiya Pearl Green is a pearl paint and Vallejo Dusken Green is a metallic, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Dusken Green is more saturated, warmer than Pearl Green. They are different kinds of paint.
The same difference applies the other way round: Pearl Green is more muted, cooler.
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 Pearl Green on the colour wheel See Dusken Green on the colour wheel
All matches: Pearl Green equivalents · Dusken Green equivalents