I noted down the signal reading on my Mate9 before switching. At my office desk, it is generally -10 dBm weaker on the N10+.
Compared with my colleague's Mate20p, his is also about -11 dBm stronger.
Both comparisons with the same operator.
This could be the difference between being able to make a call or surf when the signal is already weak
On the charging side, I noticed Sammy does not differentiate the name when it comes to charging speed.
Charged with my power bank of 5V/2A; 9V/2A output ratings, it said fast charging.
But it is definitely not taking 18W, 'cos my power bank will show a different color LED if it does.
Switching to my car charger, it also said fast charging, but the time to full charge is shorter... I suspect it is running at 15W.
So, if Sammy do differentiate the charging names, perhaps they can encourage users to better utilize their phones
Anyone know of power bank supporting both 15 and 18W output

Normal type C cable or power bank that support QC 3.0 Samsung only allows max 15W no matter how. Tried on usb meter.