No. When you back out of an application, it is left open for x amount of time and then shut down by the OS if not being used, to make room for another app's needed resources. The home button leaves the application open AND still running and more priority than a new application. It does this because it thinks you're wanting to go back to it. Search foreground and background differences and you'll see what I mean...may need to use Google instead of the search option here for the best results though.
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If you press the back button, isn't the app still running? What's the difference between pressing home and back?
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