ePHOTOzine's Versus Mode
, which was recently added to the gallery, has proven to be a popular feature among the site's members.
Since its release, 219,000 total comparisons have been made, 296,000+ photos have been compared in total and only 1.3% of active users have opted out.
The feature, which takes two photos at random and sits them side-by-side so the user can pick which they think is the better of the two photos, is still in Beta but the team continues to work on improving it.
You can find Versus Mode, along side the VS Leaderboard which ranks the images, here: Versus Mode