Testing microSD card speed on a Mac is rather pointless because performance is (severely) limited on the Raspberry Pi through it's terribly slow interface, not necessarily the actual card.
Remember RPi 1-3 use a plain SPI interface, and even the new 4 only has UHS-1.
I have no idea what your point is. Testing on a mac is pointless because RPi performance is limited?
Except the article showed the exact same performance in both places.
It started with: Why don't these cards designed for things like RPi actually show any improvement? Oh, they don't show improvement on any device at all, they are full of crap.
The point is if the cards actually meet spec and if they behave differently on the RPi.
So the first step is to show how the cards behave in an environment with no artificial performance limitations. This is the baseline "peak performance".
The next step is to show whether the RPi's performance ceiling is below that baseline, or if any specific card behave particularly poorly on the RPi. 2 cards may be equal on a high performing machine but for some reason have big differences when running in the RPi.
Even at 25MBps, it's very easy to see if you're bottlenecked to less than a thousand 4K writes per second (4MBps), and pretty easy to see if you're bottlenecked to less than three thousand 4K reads per second (12MBps).
Remember RPi 1-3 use a plain SPI interface, and even the new 4 only has UHS-1.