iOS 8 includes encryption that is enabled by default, whereas in Android it is optional.
Do both operating systems decrypt everything on boot and then the PIN is used to unlock it until it is turned off? Turning off wipes the decrypted files from volatile memory. Then when the user boots their PIN decrypts them all again. Is this true?
If so, does this mean if an encrypted device is taken when it is powered on then the pin could be bypassed (with difficulty) and the files could be accessed in a decrypted format?