I always found whatever code I saw from Apple to be more readable and neat than things from Google, granted, I never had access to anything serious but still...

I always found whatever code I saw from Apple to be more readable and neat than things from Google, granted, I never had access to anything serious but still... My impression is Apple likes to polish everything about the user experience and Google likes to have as much broad impact as possible. Performance of apps depends much more on the actual app developer than OS supplier I would say, I bet you could find more inefficiencies in Apps than in actual OS code (famous last words).