Actually iOS devices starting with iPhone 5 are mutlicore.
The iPhone 6 uses an A8 dual core CPU running at 1.4GHz
The GPU is the newer quad core PowerVR.
iOS more optimized, requiring less power to run it.
Android normally is modified by the OEM, which requires more power to run the OS.
Either way the game won't run any better on Android, due to Bethesda being horrible at optimizing and debugging their games.
Never expect Bethesda's games to run smoothly ever!
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