ΔE 22.7, loose: different enough that you should pick on purpose. Reikland Fleshshade is noticeably lighter, more saturated than Strong Skin Shade.
✓ Army Painter Fanatic conversion chart lists these two as equivalents.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Reikland Fleshshade is noticeably lighter, more saturated than Strong Skin Shade.
The same difference applies the other way round: Strong Skin Shade is noticeably darker, more muted.
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 Strong Skin Shade on the colour wheel See Reikland Fleshshade on the colour wheel
All matches: Strong Skin Shade equivalents · Reikland Fleshshade equivalents