ΔE 26.0, loose: different enough that you should pick on purpose. Red Flesh is noticeably lighter, much more muted than Resplendent Red.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Red Flesh is noticeably lighter, much more muted than Resplendent Red.
The same difference applies the other way round: Resplendent Red is noticeably darker, much more saturated.
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 Resplendent Red on the colour wheel See Red Flesh on the colour wheel
All matches: Resplendent Red equivalents · Red Flesh equivalents