A comparison of the latest versions of Apple IOS and Android does not give the same answer as an equivalent comparison done a few years ago.
Google’s Android OS has become the #1 operating system shipped with smart phones and tablets worldwide. This is a merit-based result. With the release of Android 4, the new Holo Light and Dark interface provides users with a clean and sharp UI on their mobile devices.
On UI specifics, the majority of users still say they prefer the appearance of the IOS interface on Facebook. When viewing friends’ requests on Facebook there is nothing to choose between the two systems. On Twitter and for viewing @ messages there is again nothing to choose between the two systems.
Android works better with Google Translate and also with the sound of a foreign language. It also does better for those apps which allow you identify the name of a song from its sound while being sung.
For Geocaching most people distinctly prefer the IOS interface. However, when it comes to selecting a cache you had previously found Android has a 100% success but IOS only 40%.
And so it goes on to and fro. Any thorough and independent test today, by whomsoever it is done, ends up with Android in front by a modest margin. There is a big element of subjectivity in the differences.