ΔE 17.6, loose: different enough that you should pick on purpose. Light Orange is noticeably lighter, warmer than Plaguebearer Flesh. They are different kinds of paint: Citadel Plaguebearer Flesh is a one-coat contrast-style paint and Golden Light Orange is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Light Orange is noticeably lighter, warmer than Plaguebearer Flesh. They are different kinds of paint.
The same difference applies the other way round: Plaguebearer Flesh is noticeably darker, 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 Plaguebearer Flesh on the colour wheel See Light Orange on the colour wheel
All matches: Plaguebearer Flesh equivalents · Light Orange equivalents