Android 7.0 flashing question

Hello, I want to flash the 7.0 update yet I'm uncertain as to which build I'm supposed to use. I'm currently on MTC19T but don't know which I'm supposed to use from the factory images " 7.0.0 (NRD90T)" or "7.0.0 (NRD90U) ".

I'm currently on PureNexus ROM with ElementalX kernel.

This is about the Nexus 6P.

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