ΔE 12.2, fair: the same colour family, but not a straight swap. Manticore Ochre is a little lighter, more muted, cooler than Ryza Rust.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Manticore Ochre is a little lighter, more muted, cooler than Ryza Rust.
The same difference applies the other way round: Ryza Rust is a little darker, more saturated, 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 Ryza Rust on the colour wheel See Manticore Ochre on the colour wheel
All matches: Ryza Rust equivalents · Manticore Ochre equivalents