ΔE 38.8, loose: different enough that you should pick on purpose. Blush Red is noticeably lighter, much more saturated, warmer than Carroburg Crimson.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 39). Blush Red is noticeably lighter, much more saturated, warmer than Carroburg Crimson.
The same difference applies the other way round: Carroburg Crimson is noticeably darker, much 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.
See Carroburg Crimson on the colour wheel See Blush Red on the colour wheel
All matches: Carroburg Crimson equivalents · Blush Red equivalents