ΔE 29.5, loose: different enough that you should pick on purpose. Salmon Rose is noticeably lighter, cooler than Red Oxide.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 30). Salmon Rose is noticeably lighter, cooler than Red Oxide.
The same difference applies the other way round: Red Oxide is noticeably darker, 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 Oxide on the colour wheel See Salmon Rose on the colour wheel
All matches: Red Oxide equivalents · Salmon Rose equivalents