A few hundred extra dollars for something you use many hours per day for multiple critical tasks is hard for me to nitpick about, so I think whatever people like to use (evidenced by what they are buying) shows what provides them the most value.

Unit sales don't say anything in my opinion, other than people who can't afford seem to be going with Android. If you want to make a statement about which user experience is preferable for most people, then the high end phones, which are the phones being chosen out of preference, is the data you want.