As the world’s least experienced statistician, I’ve got to say the design of the experiment (likely), the report on the experiment (less likely), or your relaying of that report (extremely unlikely, since you guys are smart), is poor. I may have missed it on the source page, but I have no idea where you got “9 phones from each brand” when the website appears to say “6 models from each brand” and neither of those descriptions suggests they actually tested more than one of each model (possible, then, that the XR they got was a dud.) I’m not sure I buy the results, even if the premise of the conclusion is definitely believable.