Which browsers make your devices run ‘10x hotter’? Both Safari and Chrome are based on WebKit, and while Chrome is resource-heavy, Safari is definitely not a lightweight either.
This hasn't been true in nearly a decade. Chrome forked away from WebKit (they named their new engine Blink) in 2013.
So for the first 5 years of its existence it was the same. In the 9 years since, the two years have drifted apart.
===
Apple is trying to accuse Chrome of being the new Internet Explorer, but they have it backwards. Safari is the new Internet Explorer.
IE had a giant marketshare because of unfair practices. Chrome beat it back and won despite those unfair practices because it was better.
And now we have the same thing - Safari has its giant marketshare because of unfair practices. They're actually more extreme than what Microsoft ever did, so Chrome hasn't been able to do anything on iOS.
Of course, the truly great browser is Firefox.
If iOS allowed for other browsers, I think Firefox would be the major winner. Sure, maybe in absolute terms we'd see more Chrome on iOS than Firefox on iOS, but Firefox would double their marketshare while Chrome's would only increase by ~20%. This could maybe give Firefox the boost they need to keep fighting against Chrome and keep the pushing the web as a whole forward.