fire up the browser, youtube, facebook, twitter, gmail, switch to NFS Undercover, change audio settings to play only sounds, and continue playing, go back to the browser, create a couple of new tabs, open up an e-book reader, select a book, flip through a few pages, switch to twitter, check gmail, open up G+, play vector runner for a couple of seconds, switch to facebook, fire up Saavn, start playing vector runner again
... you can keep doing that on iOS forever, droids would fry up pretty fast, the game would definitely begin to frame and hang at this point
Droids have a task manager, or free task managing apps, or custom shells that handle part of the tasks, or the manufacturer may bundle in some kind applications to handle the mail and social networking... plus the latest version takes away control from everybody, so its really not fair to compare, they are just two very different ways to use the device. Droids dont really support multi-tasking either. you cant write an app to unfold proteins and keep it running in the bg, while you do other stuff