ΔE 10.7, fair: the same colour family, but not a straight swap. Titan Mars Pale is more saturated, warmer than Bony Spikes.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Titan Mars Pale is more saturated, warmer than Bony Spikes.
The same difference applies the other way round: Bony Spikes is 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 Bony Spikes on the colour wheel See Titan Mars Pale on the colour wheel
All matches: Bony Spikes equivalents · Titan Mars Pale equivalents