I compared multi tasking and apps that are important to me on iOS, with an old htc one on Android belonging to a guy at work.
No reason to leave iOS as far as I can see. So as I was bored with iOS I upgraded to the latest firmware and dropped all that Jail braking cobblers. I had to pay for tomtom,which is Na on Android I'm told, but its a good app that's worth the money.
Apple have copied Androids task manager, which allows scrolling through screen shots of the apps that are open on screen. There are a few instances where it's very handy to have info in one app. visible when typing that info into another app. Copy and paste isn't always suitable for this task. In fact copy and paste is fiddly on iOS.
Its a step in the right direction for better multi tasking, but neither of the current crop of smartphone software allow the level of functionality Nokia had in their smartphones. Eg the phone app. Is utterly appalling on both os's, in that multi tasking is ignored. You receive a voice mail quoting a number to call back on. It's not the same number they called you on or the callers number is blocked, so you need to dial the number in the voice mail.
Its a smartphone right? Wrong. Play the voicemail on speaker, then open the the phone keypad to tap in the number as you listen to the message. Nope, can't do it, the voicemail part of the phone app closes as you open the keyboard. Both Android and Apple are the same in this regard. (Yes you can memorise it, but why risk a redial or two, and my memory is appalling ESP when tired)
Type in a number on the phone keypad, and miss out a digit, you can't move the curser along and insert the one missing digit, you have to erase all the numbers back and redial them all again once the correct number is entered. This is not a "smart" piece of design.
Still, at least they don't crash... Oh now wait. Yes they do, after updating to 7.4 (But only once so far
)