ΔE 16.6, loose: different enough that you should pick on purpose. Khaki Drill is noticeably lighter, more saturated, warmer than Papyrus.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Khaki Drill is noticeably lighter, more saturated, warmer than Papyrus.
The same difference applies the other way round: Papyrus is noticeably 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 Papyrus on the colour wheel See Khaki Drill on the colour wheel
All matches: Papyrus equivalents · Khaki Drill equivalents