ΔE 12.1, fair: the same colour family, but not a straight swap. Moon Mist Grey is a little lighter, more muted than Urban Buff.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Moon Mist Grey is a little lighter, more muted than Urban Buff.
The same difference applies the other way round: Urban Buff is a little darker, 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.
See Urban Buff on the colour wheel See Moon Mist Grey on the colour wheel
All matches: Urban Buff equivalents · Moon Mist Grey equivalents