It's basically the same as your Raser laws, just a different name and different penalties. But the concept is the same in terms of harsher penalties for being 50km/h over the limit.

The nomenclature of "stunt driving" (performing dangerous, irregular maneouvres for the fun of it) or "street racing" (racing dangerously on public streets with regular traffic present and ignoring limits, signs, and signals) laws is because these were the motivations given for enacting these limits in the first place. That rhetoric caught on and became how people refer to these limits in everyday conversation regardless of whether the limits actually do anything to combat these activities.

Stunt driving is basically extreme speeds, going 40+ over in anywhere the speed is 80 or lower, and 50+ if the speed limit is over 80, is considered stunt driving. It's a roadside 30 day license suspension and your car is impounded for 14 days, at your expense, with a fine of $2000-10,000, and 6 demerit points. It's used to be called careless or reckless driving, but they upped it to a new charge.

What you listed is basically stunt driving in Ontario. During the pandemic and lockdowns, people were caught going 100+ over on the empty highways.

I drive a Ford Focus, so it's safe to say I'll never get a stunting charge! (I also don't drive like an asshole)