A:AnswerI use this charger with my Galaxy S9+ and it fast charges my phone. It should work with the Note 9 since the phones have similar hardware. Highly recommend this car charger.
A:AnswerYes
And I even plug a iPhone charging cable into it
What this charger is great for is when you want to fast charge your phone in your car
Or have a battery with a 12v socket converter
Takes 70 to 80 min to charge my N9 from absolute zero (long drives to and from camp trips)
A:AnswerI have the Note 5 and the Galaxy 5 and it fits those, so if you've ever borrowed anyone's charger that had those, then you'll know. It seems like the Android charger was the same one up until the 9.
A:AnswerIt is better than the verizon version, but only for your samsung phones. If you have a non-samsung phone, you'll probably be better off with the verizon charger.