They rode only on the street, as far as I can tell, and it seems to me he's commenting on their overall performance, not just their "supermoto" cred.
I think you need to lookup what a supermoto is.
I'll give a brief history.
in the 70s, there was a made for TV series that took the best paved track racers, dirt track racers, and motorcross riders, and made a "equal" series with some high speed asphalt, some dirt. mild jumps. The bikes were dirtbikes with road tires.
It went ok, then died in the USA. It took off in europe, but remained distant from the USA until around the early 2000s.
In the early 2000s, a bunch of politics made the 4 stroke motorcross bike competitive with the 2stroke... 4strokes became common.
This let the idea of putting sportbike size wheels on a motorcross bike more feasible. it took off like gangbusters with anyone that liked to turn fast, jump, or otherwise be a hooligain. Instead of stunting on a 450lb sportbike with little suspension travel, you can wheelie on a bike made for it, with the 12" of suspension that a dirtbike offers, and the grip of the latest sportbike tires.
so if you like to attack the turns, theres a lightweight bike. If you like to ride it hard, hitting jumps, it does it. If you like to mess around and cause trouble, its the go-to machine.
Its not for long trips. Its not for commuting. its not for trail riding or going hard offroad... its mostly for fooling around on in the manner that 18-29 year olds like to do on motorcycles.
Its NOT for posers. Its NOT for looking cool. Girls dont like your dirtbike with funny small wheels. Cruise in guys dont like your odd looking bike near their polished frame sportbikes with LED lights. Cruiser guys dont like you doing wheelies in their parade. Its not for them.
Its sole existence is to dick around on in a manner that would be called irresponsible at best.
That is the essence of a supermoto.
That is why if it cant wheelie on demand, it is not a supermoto.
Weight is a funny one.
The SR is lighter at 407 lb.
According to google the average WET WEIGHT is 428 lb.
A 2015 Yamaha R6 (what I use to own) is 417 lb. You can easy lighten a R6 with a illegal exhaust system, but I don't think you will save 10 lb.
I donno about the R6, but most sportbike exhausts contain the cat, and a valve to limit the noise when at street RPMS... so my CBR1000RRs exhaust weighed over 10lbs. It was ridiculous.
In anycase, most journalists and armchair riders compare advertised weights.