ΔE 24.7, loose: different enough that you should pick on purpose. Trollblood Highlight is a little lighter, much more muted, cooler than Kislev Flesh.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Trollblood Highlight is a little lighter, much more muted, cooler than Kislev Flesh.
The same difference applies the other way round: Kislev Flesh is a little darker, much more saturated, warmer.
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 Kislev Flesh on the colour wheel See Trollblood Highlight on the colour wheel
All matches: Kislev Flesh equivalents · Trollblood Highlight equivalents