ΔE 6.7, close: similar, with a visible difference side by side. Trollblood Highlight is a little darker, more muted than Wraithbone.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Trollblood Highlight is a little darker, more muted than Wraithbone.
The same difference applies the other way round: Wraithbone is a little lighter, more saturated.
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 Wraithbone on the colour wheel See Trollblood Highlight on the colour wheel
All matches: Wraithbone equivalents · Trollblood Highlight equivalents