KEY²:
BBF100-1, single SIM global
BBF100-2, single SIM N.A.
BBF100-4, dual SIM China
BBF100-6, dual SIM global
BBF100-8, dual SIM Japan
BBF100-0, single SIM Japan
KEY² LE:
BBE100-1, single SIM global
BBE100-2, single SIM N.A.
BBE100-4, dual SIM global
BBE100-5, dual SIM N.A.
https://docs.google.com/spreadsheets...gid=1381535354
KEY² LE keyboard seems consistent throughout entire construction period. All product is identical except for colour / storage.
KEY² spacebar seemed to get better with later assembly dates, although I have an early one and it is perfect.
Any KEY² with a PRD ending in -5xx or Red in colour would be the latest models assembled.
Battery life does not change with respect to memory or storage.
Some dual SIM KEY² devices (all the Red and a few Black) come with 128GB of storage, but most are 64GB.