ΔE 20.3, loose: different enough that you should pick on purpose. Shiny Skintone is noticeably lighter, more muted, cooler than Ryza Rust.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Shiny Skintone is noticeably lighter, more muted, cooler than Ryza Rust.
The same difference applies the other way round: Ryza Rust is noticeably 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 Shiny Skintone on the colour wheel
All matches: Ryza Rust equivalents · Shiny Skintone equivalents