ΔE 13.5, fair: the same colour family, but not a straight swap. Mephiston Red is a little darker, more saturated, cooler than Red Brick.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Mephiston Red is a little darker, more saturated, cooler than Red Brick.
The same difference applies the other way round: Red Brick is a little lighter, more muted, 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 Red Brick on the colour wheel See Mephiston Red on the colour wheel
All matches: Red Brick equivalents · Mephiston Red equivalents