Van Dyke Brown Hue vs German Red Brown

How close are they?

ΔE 15.5, loose: different enough that you should pick on purpose. German Red Brown is a little lighter, cooler than Van Dyke Brown Hue.

Can I use German Red Brown instead of Van Dyke Brown Hue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). German Red Brown is a little lighter, cooler than Van Dyke Brown Hue.

Can I use Van Dyke Brown Hue instead of German Red Brown?

The same difference applies the other way round: Van Dyke Brown Hue is a little darker, warmer.

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.