ΔE 18.0, loose: different enough that you should pick on purpose. Hoeth Blue is a little darker, warmer than Aegis Aqua.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Hoeth Blue is a little darker, warmer than Aegis Aqua.
The same difference applies the other way round: Aegis Aqua is a little lighter, 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 Aegis Aqua on the colour wheel See Hoeth Blue on the colour wheel
All matches: Aegis Aqua equivalents · Hoeth Blue equivalents