The following features are compared and elaborated on further in this video:
1. Internet Browsers, Performance and Speed
2. Maps and GPS Availability
3. Phone Hardware Options And Choices
4. Phone Hardware Prices and Availability
5. Music and Media Organization and Playback
6. Comparison of App Stores iTunes and Google Play
7. Prices of Apps Available in each store.
There are many opinions on this topic so I attempted to be fair across the board. Hope it helps you decide your next purchase!