ΔE 13.7, fair: the same colour family, but not a straight swap. Medium Violet is noticeably darker, more muted than Eidolon Purple Clear.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Medium Violet is noticeably darker, more muted than Eidolon Purple Clear.
The same difference applies the other way round: Eidolon Purple Clear is noticeably lighter, 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 Eidolon Purple Clear on the colour wheel See Medium Violet on the colour wheel
All matches: Eidolon Purple Clear equivalents · Medium Violet equivalents