ΔE 17.4, loose: different enough that you should pick on purpose. Azurite Hue is noticeably lighter, cooler than Omega Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Azurite Hue is noticeably lighter, cooler than Omega Blue.
The same difference applies the other way round: Omega Blue is noticeably darker, 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 Omega Blue on the colour wheel See Azurite Hue on the colour wheel
All matches: Omega Blue equivalents · Azurite Hue equivalents