Do they list the models of the brands they are talking about anywhere? For example, they mention Garmin but there is a huge variety of Garmin models with varyin

Do they list the models of the brands they are talking about anywhere? For example, they mention Garmin but there is a huge variety of Garmin models with varying accuracy. I'm surprised I can't find it anywhere. They mention gathering data ("The majority of commercially available devices measure these basic metrics, while other metrics typically vary between different brands and models.") on different models but then group them together under a single brand? Why? Frankly, this analysis seems a bit half-assed.