That guy is a Triumph fan boy if you watch all his other videos, and rode both bikes almost exactly 1 year apart for less then 15 minutes. The seat was killing his bony ass on the Norton, his words not mine. You cannot have fun with a sore ass, and that is what is driving his assessment. Talk to someone who owns both if you want an honest opinion and "no dog in the fight" And no sore ass!
The Triumph has several reports over 3 different forums of paint chipping off (including a dime size piece ) and plating coming off, all documented with photos. Mine is no different, I am afraid to touch it. One dealer said to not wash it for 3 months because the paint has to setup, I am not going to wash my new bike for the summer!!!! There are reports of stalling, bad fueling and ticking sounds and instruments fogging internally. All of these reports are on very low mileage or even the first ride. Triumph has a much better dealer network with parts and accessories more available. The Triumph rides, handles and stops great, just as it should!
As to the engines both bikes are in the same class. In my opinion the Norton needs a less constricted pipe and re-mapping before the engine can be assessed, not so the Triumph, but this is quick and easy to do and maps are free! They are in that niche where they have enough power to be super fun on any street legal situation ( and then some ). This class is where Ducati and others sell 10's of thousands of bikes, not superbikes. The superbikes usually go to much less experienced and younger riders who believe every mag and video they see and are certain they can outride Marquez or Rossi anyday.
As far as the Norton goes they are a handmade exotic. Most were assembled very well but there are documented cases of problems. Most get a good one some don't.
The engine is air cooled and that is huge to me. There is not another one within 100 miles of me, it draws crowds and is noticed everywhere. Its handles great has enough power, and superb brakes. It is the 29th bike I have owned in over 45 years and though not the reason I bought it the Norton makes me feel more special then any other bike including the Triumph, and I have had the best of the best of the 80"s, 90"s and 2000"s The fit, finish, paint and components are second to none! Many who want to compare do not have the means to buy or maintain this bike. To them I say buy the Triumph or an R Nine T. I want one true Exotic in my garage.
There are several other bikes that can do the same job as my Thruxton, 2 are in my garage right now! I cannot say that about the Norton, it is in a class by itself!