ΔE 18.7, loose: different enough that you should pick on purpose. Midlund Flesh is noticeably lighter, more muted, warmer than Aged Hide. They are different kinds of paint: Army Painter Aged Hide is a one-coat contrast-style paint and Formula P3 Midlund Flesh 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 19). Midlund Flesh is noticeably lighter, more muted, warmer than Aged Hide. They are different kinds of paint.
The same difference applies the other way round: Aged Hide is noticeably darker, more saturated, 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 Aged Hide on the colour wheel See Midlund Flesh on the colour wheel
All matches: Aged Hide equivalents · Midlund Flesh equivalents