And the winner is...
The Kindle Fire HDX. It wins on the strength of its superior interface and software/content, though it excels in other matters, too.
I found myself using the Fire HDX more often than the Nexus 7 to watch movies and to read on the train ride home. Its smaller size and convenient content carousel help guide you to exactly what you're most likely to use a tablet for, without having to sift through a library of apps or spend hours setting it up. The HDX is also a keen choice for technologically challenged family members, as it offers better out-of-the-box functionality. And it doesn't hurt that the Fire HDX is the cheaper of the two: a 16GB second-generation Nexus 7 costs $269, while the 16GB version of the Kindle Fire HDX will set you back $229.
Multitaskers looking for a huge app library and maximum flexibility, however, might prefer the Google Nexus 7. It provides access to a vast application library, and it's a good option for families looking to share a tablet, since it lets you switch between user accounts. You don't have to worry about missing out on Amazon's features, either, because Amazon's services are available as individual apps in the Google Play store.
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