The Red Baron vs Light Orange

How close are they?

ΔE 21.9, loose: different enough that you should pick on purpose. Light Orange is a little lighter, warmer than The Red Baron.

Can I use Light Orange instead of The Red Baron?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Light Orange is a little lighter, warmer than The Red Baron.

Can I use The Red Baron instead of Light Orange?

The same difference applies the other way round: The Red Baron is a little darker, 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.