My experience has been that Android phones have lower capital costs and higher TCO. I buy an iPhone, keep it a few years, sell it for a few hundred bucks and buy another. I buy an Android phone, Google cuts the price by half six months later, and within two years the resale value of the phone is zero. One of the reasons I stopped buying Android phones was because it was an expensive habit.

But ... if you keep your phones until they literally fall apart, the economics are different. Though over a span of, say, five years, it doesn't really amount to much either way.