If you've only ever used an Android or iPhone, how can you possibly know that you've made the right choice? This flowchart from the Carlcheo tech blog guides you through both mobile operating systems in a bid to find out which mobile OS is best for your personal needs.
The infographic below is perhaps a teensy bit biased towards Google's OS (e.g. - "are you an iSheep?"), but it still does a pretty good job of mapping out each platform's strengths and weaknesses. As with any tech product, it all comes down to your intended purpose and personal preferences.
It's worth noting that this flowchart is a couple of years old and some of the points are less true than they once were. (Crowning iPhone the best camera phone is somewhat debatable, for example.)
Nevertheless, if you're device agnostic and looking to buy a new phone, it still provides a pretty good overview.