ΔE 17.1, loose: different enough that you should pick on purpose. Hansa Yellow Light is a little lighter, much more saturated than Dorn Yellow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Hansa Yellow Light is a little lighter, much more saturated than Dorn Yellow.
The same difference applies the other way round: Dorn Yellow is a little darker, much 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 Dorn Yellow on the colour wheel See Hansa Yellow Light on the colour wheel
All matches: Dorn Yellow equivalents · Hansa Yellow Light equivalents