ΔE 23.0, loose: different enough that you should pick on purpose. Dead Flesh is noticeably darker, much more saturated, warmer than Light Bismuth Yellow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Dead Flesh is noticeably darker, much more saturated, warmer than Light Bismuth Yellow.
The same difference applies the other way round: Light Bismuth Yellow is noticeably lighter, 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 Light Bismuth Yellow on the colour wheel See Dead Flesh on the colour wheel
All matches: Light Bismuth Yellow equivalents · Dead Flesh equivalents