ΔE 15.7, loose: different enough that you should pick on purpose. Iceberg Grey is noticeably lighter, warmer than Remove Mana.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Iceberg Grey is noticeably lighter, warmer than Remove Mana.
The same difference applies the other way round: Remove Mana is noticeably darker, 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 Remove Mana on the colour wheel See Iceberg Grey on the colour wheel
All matches: Remove Mana equivalents · Iceberg Grey equivalents