The test that really stands out to me here is the Web Basemark one, since it's not completely synthetic or looking at what might be useful things, it's measuring what most people spend all day doing with their phones.
Nor is it a case of "So what if sending an email takes 200ms instead of 100ms?" Websites today--for both good and absolutely stupid reasons--often hit the CPU
really hard, and I can think of plenty of times a site takes time to load or is sluggish even on very high-end desktop hardware.
And the A15 iPhone is
twice as fast as Samsung's flagship. Indeed, the iPhone 11
scores about a 650 on the same benchmark, so even if you're using a two-model-year-old iPhone, it's
still faster than today's Samsung flagship.
Sure, some of that may be software optimizations, but that comes around to the very valid point "it's not all about specs". Whatever the reason is, if web page rendering and web-app response on a your 2+ year old phone is still faster than the competitor's new flagship, that matters.
That said, given the traditional love internet trolls who make a hobby of hating Apple products seem to have for benchmarks, it's also pretty funny to see the iPhone so absolutely dominant in everything but game performance, and right on par even in that area. There are genuine reasons to prefer Android over iOS, and even a Samsung phone over an iPhone, but raw speed sure ain't one of them.