Because far far more people on iOS are on hardware of the latest, standard hardware that the software is aimed at.
As I understand, the Nexus is the one Android is putting forward as an example, it is the highest quality of all phones. The whole of the current generation of iOS devices are the same, perfected examples of the hardware and software working together.
There are probably Android phones of better hardware than an iPhone, but do you know any apps that demand these phones, that are too slow on anything with a slower processor?
As I understand, the Nexus is the one Android is putting forward as an example, it is the highest quality of all phones. The whole of the current generation of iOS devices are the same, perfected examples of the hardware and software working together.
There are probably Android phones of better hardware than an iPhone, but do you know any apps that demand these phones, that are too slow on anything with a slower processor?