Even with the egregious layering problem, the map actually shows something pretty interesting: the way in which Android has colonised lower-density lower-income areas to the almost total exclusion of the iPhone. It makes sense: you can buy brand-new low-end Android devices; you can't do the same with iPhones.

So the map doesn't actually show that Android is doing poorly in high-value areas; it does, however, show that Android is doing well in low-value areas -- in addition to doing well in high-value areas. The data is a win for Android even if the map literally obscures this fact.