Space Magenta vs Barak-Nar Burgundy

How close are they?

ΔE 16.5, loose: different enough that you should pick on purpose. Barak-Nar Burgundy is noticeably darker, more saturated, warmer than Space Magenta.

Can I use Barak-Nar Burgundy instead of Space Magenta?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Barak-Nar Burgundy is noticeably darker, more saturated, warmer than Space Magenta.

Can I use Space Magenta instead of Barak-Nar Burgundy?

The same difference applies the other way round: Space Magenta is noticeably lighter, 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.