Senshi Skin vs Bare Bone

How close are they?

ΔE 9.4, close: similar, with a visible difference side by side. Bare Bone is more muted, cooler than Senshi Skin.

Can I use Bare Bone instead of Senshi Skin?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Bare Bone is more muted, cooler than Senshi Skin.

Can I use Senshi Skin instead of Bare Bone?

The same difference applies the other way round: Senshi Skin is 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.