Berserker Bloodshade vs Blush Red

How close are they?

ΔE 30.9, loose: different enough that you should pick on purpose. Blush Red is noticeably lighter, more saturated than Berserker Bloodshade.

Can I use Blush Red instead of Berserker Bloodshade?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 31). Blush Red is noticeably lighter, more saturated than Berserker Bloodshade.

Can I use Berserker Bloodshade instead of Blush Red?

The same difference applies the other way round: Berserker Bloodshade is noticeably darker, 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.