Stop it. Every time a new flagship device with impressive specifications launches in the mobile space there is an article discussing the merits of the device

and whether or not it is an iPhone killer.

It should be clear by now that this is more about the ecosystem and services instead of merely who has the most RAM, best battery life, largest internal storage, and if storage is extendable. Android has enjoyed many features first such as large screens, NFC, biometrics, and more. iOS users enjoy the App Store, which still gets many exclusive apps compared to Google Play. Apple users who use iMessage cannot easily maintain communications if they switch operating systems. The phone number has to be unregistered and the user is going to have to find workarounds and alternatives to maintain the level and quality of discourse. 

There is also familiarity with the platform to contend with when considering jumping to the competitor. Android users are used to nuances and gestures as are iOS users. This muscle memory is a strong motivator to avoid change. Tech enthusiasts and people who enjoy change either have the savvy to alter their behavior or the mindset. Most people do not seek out this experience because it is jarring and uncomfortable.

Android is the #1 operating system in terms of market share and this is not even a question when considering the marketplace on an international level. If that is the criteria that matters, then Android has won and will keep winning for the foreseeable future. If you look at who is getting the profits, Apple is winning and winning big versus the Android partnerships. This can be interpreted as both of them killing it from a point of view.