ΔE 17.5, loose: different enough that you should pick on purpose. Majin Pink is a little lighter, more saturated, warmer than Impish Rouge.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Majin Pink is a little lighter, more saturated, warmer than Impish Rouge.
The same difference applies the other way round: Impish Rouge is a little darker, 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 Impish Rouge on the colour wheel See Majin Pink on the colour wheel
All matches: Impish Rouge equivalents · Majin Pink equivalents