ΔE 25.7, loose: different enough that you should pick on purpose. Rosy Flesh is a little lighter, much more saturated, warmer than Trollblood Highlight.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Rosy Flesh is a little lighter, much more saturated, warmer than Trollblood Highlight.
The same difference applies the other way round: Trollblood Highlight is a little darker, 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 Trollblood Highlight on the colour wheel See Rosy Flesh on the colour wheel
All matches: Trollblood Highlight equivalents · Rosy Flesh equivalents