This statement, truism or otherwise, is irrelevant. As I outlined in this and other messages, nothing
is the same, from one device to another, even from the same familiy of devices. Is coffee from an espresso machine vastly different than the same coffee from a moka pot? As the photos and tasting show, not when it's cold, it's not. As mentioned, my taste tester could not tell the difference, and preferred the coffee from the cheapest moka pot over the most pricey 15-bar pump espresso machine.
Originally Posted by trentski
No such experiment is definitive, regardless of whether it meets the criteria set by Western scientific establishment rules. What you believe is also subjective, and you can be wrong in what you believe. Just as so-called "science" can and has been wrong in what it has believed, by its own 'scientifically valid' testing, countless times. But I'll tell you what: give me a $10,000 grant, and I'll do better next time to hold the test to scientific standards...