Rhinox Hide vs Asheth Grey

How close are they?

ΔE 17.9, loose: different enough that you should pick on purpose. Asheth Grey is a little darker, much more muted than Rhinox Hide.

Can I use Asheth Grey instead of Rhinox Hide?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Asheth Grey is a little darker, much more muted than Rhinox Hide.

Can I use Rhinox Hide instead of Asheth Grey?

The same difference applies the other way round: Rhinox Hide is a little lighter, much 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.