http://www4.discreet.com/subscription/subscription.php?id=432
… 2 months.. and then we find out exactly how MR 3.4 compares to the current issue of Vray. Then again, it doesnt support LightCache/Light Map, or Irradiance mapping… At least its not in the description.
I bet Vray will still handle caustics, reflection, refraction, and fog a lot better than mray.