Now that the two platforms have pretty decent feature parity (Siri intelligence and a few remaining cloud issues aside), for most people it comes down to two things: Does it look nice and is it easy. Apple almost always wins that war. For teens, the iPhone is more prestigious than an Android phone because of the price. You're just not gonna find an iPhone 7 anywhere for more than $50 off, and even a 6s is relatively pricey. Although Samsung is charging a lot more for the S8, so who knows—I don't think that will pay off at all, especially after the battery debacle. Samsung is not synonymous with quality for most people. Since this study pertains to the U.S., the only real Android brand left that most people consider is Samsung, and parents with teens are more cautious by nature. They don't want their kid to explode, or their house to burn down. So even if they wanted a Samsung, I imagine a lot of parents wouldn't buy it. I'd spend more for my kids to have an iPhone, or just give them my old one every year, but I'm probably an outlier.