Sony Mobile has pushed a new firmware update for the Xperia XZ and Xperia X Performance that moves the build number from 39.2.A.0.327 to 39.2.A.0.361. This latest Android Nougat update adds the 1 December 2016 Google security patches, but not much else appears to have changed. The update has landed in the Nordics and Latin America, and is only live for the single SIM variants of the Xperia XZ (F8331) and X Performance (F8131).
Thanks Andy, Cristian, Jenge, Paulo, Shahram!