Yes, Nokia 6.1 (2018) does have the USB Type C port and does support fast charging. It takes about an hour to charge the phone from 0% to 40%.
Nokia 6.1 (2018 edition) has a weight of 172 grams.
Yes, Nokia 6 (2018) does have the OTG support.
Yes, New Nokia 6 (2018) does have the series 6000 Aluminium Alloy metal body.
No. The new Nokia 6 (2018) does not have the face unlock.
At the end of the day, the Nokia 6.1 (2018) brings some welcome improvements over its predecessor.