How they compare
Both are premium memberships, built very differently.
Vixen is a single luxury studio from Vixen Media Group, with 600+ cinematic scenes and about 70 new ones a year, at about $30 a month before deals.
Adult Time bundles dozens of studios, VR included, into one subscription at $19.95 a month or $143.40 a year to stream, the closest thing to a porn streaming service. Its short trials convert to a higher monthly rate if you don't cancel.