North America modelWCDMA: Bands 1/2/4/5/8
FDD-LTE: Bands 1/2/4/5/7/12/17/30
CDMA EVDO: BC0
Europe / Asia modelWCDMA: Bands 1/2/5/8
FDD-LTE: Bands 1/3/5/7/8/20
TDD-LTE: Bands 38/40
China modelWCDMA: Bands 1/2/5/8
FDD-LTE : Bands 1/3/7
TDD-LTE: Bands 38/39/40/41
TD-SCDMA : Bands 34/39
CDMA EVDO: BC0
Sgp using bands 3, 7, 8 (only SingTel, according to wiki).
US set missing band 3, China set missing band 8.
China bands look good (if you travel frequently to China) but no idea wht the os is similar besides the language. I.e hydrogen vs oxygen os.
For os wise, can be flashed as well, if you are considering China set.
Just my 2cents.