Three coats of each color, Venus di Violet on index and ring fingers and Demure Vixen on middle and pinky fingers.
sunlight
shade
indoors
bottle shot!
The Verdict? Obviously they aren't dupes, Demure Vixen is darker and more mauve, but they are relatives. Demure Vixen is somewhat of a darker version of Venus di Violet. The shimmer in DV is a little more "secret" and VdV is a little more obvious. Also the shimmer isn't 100% the same, although it is very similar. It feels almost identical but VdV is a little pinker, more of a purpley-pink shimmer.
The Verdict? Obviously they aren't dupes, Demure Vixen is darker and more mauve, but they are relatives. Demure Vixen is somewhat of a darker version of Venus di Violet. The shimmer in DV is a little more "secret" and VdV is a little more obvious. Also the shimmer isn't 100% the same, although it is very similar. It feels almost identical but VdV is a little pinker, more of a purpley-pink shimmer.
If you like one you'll probably like the other polish, I hope this helps :) Are there other comparisons you'd like to see? Tell me in the comments!