Depends what you're running on it. If you run a minimal OS with limited options on a processor or a more complex OS will make a difference. That and Android has to run on any phone, so efficiëncy is probably lost there too.
No it doesn't have anything to do with that. Apple's CPUs are just better. A lot better.
Even basic stuff like copying memory from one location in the CPU to another location is drastically faster on an iOS processor. The latest iPad Air is as fast as a low end Intel x86 chip... and the iPad chip does it with *far* less battery drain than the intel one.
This tablet has a low end x86 chip, which means it will be faster than any ARM processor money can buy... except for Apple's ARM processors.