ΔE 38.5, loose: different enough that you should pick on purpose. Gloss Varnish is noticeably lighter, more muted than Primer Taupe.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 39). Gloss Varnish is noticeably lighter, more muted than Primer Taupe.
The same difference applies the other way round: Primer Taupe is noticeably darker, 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 Primer Taupe on the colour wheel See Gloss Varnish on the colour wheel
All matches: Primer Taupe equivalents · Gloss Varnish equivalents