ΔE 22.1, loose: different enough that you should pick on purpose. Plaguebearer Flesh is noticeably darker, much more saturated, warmer than Howling Sand.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Plaguebearer Flesh is noticeably darker, much more saturated, warmer than Howling Sand.
The same difference applies the other way round: Howling Sand 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 Howling Sand on the colour wheel See Plaguebearer Flesh on the colour wheel
All matches: Howling Sand equivalents · Plaguebearer Flesh equivalents