6p spec :

North America:
GSM/EDGE: 850/900/1800/1900MHz
UMTS/WCDMA: B1/2/4/5/8
CDMA: BC0/1/10
LTE (FDD): B2/3/4/5/7/12/13/17/25/26/29/30
LTE (TDD): B41
CA DL: B2-B2, B2-B4, B2-B5, B2-B12, B2-B13, B2-B17, B2-B29, B4-B4, B4-B5, B4-B13, B4-B17, B4-B29, B41-B41

Rest of world:
GSM/EDGE: 850/900/1800/1900MHz
UMTS/WCDMA: B1/2/4/5/6/8/9/19
TDSCDMA: 34/39
CDMA: BC0/1
LTE (FDD): B1/2/3/4/5/7/8/9/17/19/20/28
LTE (TDD): B38/B39/40/41
CA DL: B1-B5, B1-B8, B1-B19, B3-B3, B3-B5, B3-B7, B3-B8, B3-B19, B3-B20, B3-B28, B5-B7, B7-B7, B7-B20, B7-B28, B39-B39, B40-B40, B41-B41

Can the USA set be used here, since it also supports our LTE bands (3/5/7) ? Will it be crippled in any way compared to the "rest of world" spec ?

Thanks @SonicSpyro !

I absolutely agree - the main reason why I bought the N6 is because it's cheap now, and it's a Nexus so regular official/custom ROM updates that *do not* affect the camera quality, unlike other non-Nexus phones.

I also have friends who would not bother flashing the phones and leave it as stock - with ads and stuff (yuck! ).

To each his own la...and with a Nexus it's easy to ensure you would still get the latest Android versions even if Google is not officially supporting it anymore, plus the batteries are can be changed via DIY to prolong the life of the phone (not sure about 5x/6p...)