I prefer iOS for a variety of reasons. The first of which is the devices themselves. I have always liked the feel of an iPhone more than an Android phone. Also, when I was deciding what type of tablet to buy (Windows or Apple) I went with apple because of the easy to use, simplicity, and support for the item. Also, the App Store is a big plus for iOS compared to Android. I know that the Android has a market of sorts, but it does not have nearly the amount of coders and apps that the App Store does. Finally, my entire family is an apple family, so it is easier to collaborate with them because we all have such similar devices. It is because of all these reasons that I prefer iOS over Android.
Kevin