From what I understand usually around august / September is when manufacturers usually switch to the next model year.
http://www.bimmer.work/ this should help you
I know there were quite a few changes for the model year for USA bound mini's including fog lights, black in stead of chrome toggle gates and no more mini tags on the seats, but the only change I think is world wide is the removal of the 'hidden compartment' with the storage pack. But I have been wrong before. (don't tell my wife that)