Z3 D6683? Updates?

Hi it seems I ended up getting a Z3 D6683, it's like D6633 but China version. No difference except it's modified to work with certain chinese networks. My big concern is updates, does Sony treat models like these with equality to its other variants? Right now it says its 5.0.2 is 'up to date'.

If not, is it possible to convert this to D6633?